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Bradford,
... Wilts

To the Editor of the Monthly Magazine.
Brem,
Duddeleigh,

SIR,
Kidderminster,
Worcestershire

S
Pershore,

your excellent Miscellany has an Farwall, Pickering,

Yorkshire

nent of Europe, the information which Tyck hull,

I here transmit, may be likely, by its Total 22,

means, to meet the notice of the friends Agmondesham,

and fainily of the unfortunate ROENTGEN, Amersham,

whose faie, this cominunication records.

Bucks Marlow,

He arrived at Mogadore in the Spring Wendover,

of 1811; and, in consequence of letters Hertford,

Herts

of recommendation from Sir Joseph Southampion,

Hants

Banks, Mr. Mitford, and Mr. J. G. Town and County, S

Jackson, resided at my house. I was were among the boroughs which had dis. not at home at his arrival, and but a very used the elective franchise; but have few hours during his stay in Mogadore, been restored to the exercise of it, as as I arrived home on the Friday noon, mas also the town of Weoebiy, after a and be set off on his journey for the indiscontinuance of 300 years.

terior early the next inording. Agmondesham, and the three next, His first intention was, to have rehad discontinued this privilege fioin mained one year at Mogadore; but, 28 Edw. I., Anno 1300, to 21 Ja, I., making a journey to Morocco about iwo Anno 1628, being 323 years; when a months after his arrival, he soon after . search by Mr. Hakevill

, of Lincoln’s-inn, his return became extremely impatient into the Parliamentary Writs in the to commence bis very arduous underTower, terminated in the restitution of taking. The plan which had been retheir suspended rights, in consequence commended by me was, to engage some of a petition to the House of Commons, trader going to Tombuctoo to take him and a report of their committee adopted under his protection, and bring him safe by the blouse : upon which warrant from back for a stipulated suin; but this prothe Speaker, the Clerk of the Crown in posal carried with it too much the air of Chancery was directed by his Majesty restraint. to issue Writs of Election for these se. had had in my service for about a veral boroughs.*

year prior to Mr. Roentgen's arrival, a I may probably trouble you hereafter man born at Beverly, in Yorkshire, of with the state of the present population German parents, This fellow, when a in some, at least, of these places. seaman on-board a British ship of war,

It might be obviously possible greatly which put into Tetuan or Tangier, ran to ameliorate the present representation, away, and Orned Moor; had been a his restoring and modifying the elective renegade scme years, and was in my franchise in these boroughs, adding to employ as gardener. With this man, them (as in the case of Shoreham) a suf. Mr. Roergen unfortunately contracted ficient number of votes from the sur. a very close intimacy; which originated, rounding hundreds, though I think it po doubt, from his talking the same lanought to be greater than in that instance, guage, and the fellow's parents being And, whether there be power by pre.

natives of the same part of Germany as rogative of the crown or not, to create a

Mr. Roentgen, He therefore detere new borough; the righe of election once mined to take this renegade for his comexercised cannot be lost by disuse : panion; and, on my arrival at home, I though, for the public good, Parliament found them ready to set off. may extend it to a greater number. As I endeavoured to persuade Mr. Roentto the equilibrium secured to the Scotch gen to put it off for a few days, as I did and Irish nation by the Union, a simple not like his trusting wholly to a reneapplication of the Rule of Three solies gade; but he said things were gone too that difficulty, with addition of

very

the man was in possession of all his few members for each.

plans, and one day's delay might be

CAPEL Loret, fatal, Trosion. Dec. 6, 1812.

Mr. Roentgen was accompanied out,

the first fifteen miles, by several Euro* Prel. to Gianville's Rep. lxxxix. xcvi. peons, who returned in the trening. and the Reports 07-96.

Que renained the night with him, and

far;

1813.)

Mr. Court on the Fate of Roentgen. the next day until they reached the Ri- Oran to embark for Europe. Upon.' ver Tansif, where Mr. Roentgen sunk sending to Arzilla, however, I could not his European clothes in the river, and find him, or ascertain to a certainty that pat on the Moorish dress; and he then he had been there. pursued his journey, accompanied only A month afterwards, a Jew who came by the renegade.

from Mequinez told me, he saw him in They were provided with two good that city, and spoke to him; and that mules, a variety of beads, and other are the renegade was very shy of speaking to ticles of merchandise; about five hune him. dred dollars in money, and each well There is, I think, little doubt but Mr. armed with pistols, swords, muskets, and Roentgen was murdered by the man in daggers. Mr. Roentgen was also well whom he placed his entire confidence; supplied with drugs to pass as a physician and that man an European! The mules, when it might be necessary in the inte- the dollars, and the various articles with rior. He carried with bim also a very which the mules were loaded, were suffine copy of the Alcoran, on vellum, ficient plunder, without taking the few which inight be of service to him in gaine articles from his person, which were of ing the protection of some sheriff. little value. li is probable, too, that

At parting, Mr. Roentgen promised although the wretch could murder his we should hear of himn by every oppor. master when asleep, he might not have tunity, if only his name, date, and place, the courage to strip him afterwards. As on a bit of paper. We, however, never Mr. Roentgen had taken uncon,mon beard from him.

pains to make himself fit for undertaking When they had been gone about three such a dangerous journey as to the inweeks, it was reported here, that the terior of Africa; and, as he was a young renegade and a Moor were seen passing man of considerable calents and of great the river at Azamoré, a'towo) to the perseverance of mind, it is very much to northward of this; but, it appearing so be lamented that he should have met improbable that they should have taken with such an untimely end. that route, nu attention was paid to the As a number of letters have been adreport.

dressed to him at my house, the writers When Mr. Roentgen had been gone will have them returned, on signifying about seven weeks, accounts came from their wishes to that effect. Morocco, that a Moor of the province Mogudore,

A. W. COURT. of Sbedma had been stopped, offering for October 20, 1812. sale a watch and various other articles apparently belonging to an European; To the Editor of the Monthly Magazine. and the ruinour inmediately went forth, SIR, that they belonged to Mr. Roentgen, who had been murdered. The governor lation of the great solar eclipse of this place sent for the articles from that will happen in 1820, and conceiving Morocco, and they were all.identified as that some account of the same might not having been Mr. Roentgen's, by my bro- be uninteresting to many of your astrother, and the watch, as one which he nomical readers, I am induced to solicit always wore suspended by a ribband a corner in your very instructive and enfrom his neck. There was now but too tertaining Miscellanv. much reason to suppose this unfortunate This eclipse will not be total, even traveller had been murdered, and that where it is central, for, the moon being within three or four days' journey of this pear her apogee, or at her greatest dissa place; but still no one suspected the re- tance from the earth, her apparent se. negade. We sent to Morocco, to have midiameter will be considerably less than the examination of the Moor taken. He trat of the sun, leaving an annulus, or persisted in declaring that he found Mr. ring, of light, of nearly half a digit in Rventgen dead, and in a very putrid breadth. The annular boundary will state, under a tree; and that he took pass very near the eastern shores of E11from his person the various articles which gland and Scotland; and, on the coasts he had offered for sale.

of Norfolk and Suffulk, this eclipse will About seven months ago, I received be almost annular. intelligence that the renegade had been The central tract will commerce in seen at Arzilla, a town about 300 miles latitude 81° 43' N., longitude 1490 491 to the northward, where he was working W.; passing over Mayne's Island, to the as a gardener, and that he was going to western coast of Norway, along the

В2

Norila

moon

North Sea, and entering Germany, not The npparent time of the true conjuncfar from the inouth of the Weser, crossing tion is September, 7d. 1h. 51m. 27.25., that country to Trieste; thence down at which cine the true longitude of the the Gulph of Venice, into the Mediter. sun and moon is 5' 14° 47' 41" (happenranean Sea; and, passing near Cape Ma. ing only 43' 14.61 east of the nonagesitapan and the Isle of Candia, it leaves mal degree) with the moon's true lati the Mediterranean to enter Palestine: tude 44' 37.9" N. descending the horary passing between Jerusalem and Gaza, it motion of the moon in latitude 2' 41.94" quickiy enters Arabia, where it quits the and in longitude from the sun 27' 1.58"; earth, with the setting sun, in latitude the horizontal parallax of the moon from 27° 15' N., longitude 400 g! E. But the sun reduced to the radius vector, for the penumbra will first touch the earth the given latitude is 53' 40.08". Hence in latitude 59° 40' 38" N., longitude the longitude of the sun and moon at the 91° 5' 514 W. and finally leave it in lati- visible conjunction is 5' 14° 47' 37•8"; tude 3° 20'35" N., longitude 20° 28' E. and the apparent latitude of the moon Owing to the great northern latitude of 3' 10-73" N. Al the time of the greatest the moon, this eclipse will not extend ubscuration, the angle of the moon's vifarther south then latitude 13° 26' S., sible way from the sun is 16° 56' 16" ; longitude 320 6' E. But the penumbra and the nearest distance of their centres will pass far above the earth in the other 3' 2.455. Now the apparent semidi. hemisphere.

ameters of the sun and

are At all those places where the digits 15' 54.81" and 14' 51.93" ; hence the eclipsed are 11 to, the obscuration will parts deficient are 27' 44.29", and thre be as great as where it is central, for the digits eclipsed 104 27' 3Q'1" on the sun's whole of the moon will, in such case, opper limb; or 17° 18' 22" to the east appear upon the disc of the sun. The of ihe vertical point of his periphery; at sun will be central eclipsed on the meri. the same time, the longirude of the noa dian, in latitude 77° 20' 43" N., longi- nagesimal is 5' 11° 20' 23.7", and its allilude 160 37' 45" W.

cude 39° 1' 18.8"; the parallax of the The centre of the penumbra will be moon in latitude 41' 39.72" and longi2h. 13m. in passing over the earth, and cude 10.647". The moon is on the nothe whole duration of the general eclipse, nagesimal at 1h. 5511. 145. or about or the time of the penumbra passing over 2m. 269. after the time of the greatesc the disc of the eariis, « ll be rather more obscuration at Greenwich. than five lours and a quarter.

At ihe beginning of this eclipse, the After giving this outline of the general apparent latitude of the moon is 12' 11.3" eclipse, I shall proceed to the calculation N., and her visible difference of longi. of it for the latitude and meridian of tude from the sun 28' 17.27" ; the moon's Greenwich; but let me premise, that apparent semidiameter is 14' 53.28", and the places of the sun and moon are con- the point of contact of the sun and puted with the greatest care, and from moon's limbs is 490 9' 54.9" to the west the best astronomical tables. Moreover, of the suli's upper limb. But, owing to as the accuracy of all computations re- The moon's decrease in latitude, and the garding solar eclipses, depends entirely position of che nonagesimal at the time upon the nicely observed in obtaining of emersion, the apparent point where the parallaxes of the moon, I have been the moon's limt, quits the sun is 86° 56'0", particularly careful on this head; and, to the east of the zenith of his disc not wishing to confide in any auxiliary when the moon's apparent semidiameter tables, I have computed the paraliaxes is 14' 49.88"; the apparent latitude of from the triangles themselves; for, in the moon 5' 204 and the difference of the present instance, the conjunction longitude 30' 17". happens so very near the nonagesiu al Eclipse of the Sun at Greenwich, degree, a greater exacıness was required, September 7th, 1820: apparent time owing to the currature of the apparent P.M. orbit; and I have ascertained no fewer than ten points of the segment of the

Beginning at

12 23 45

Visible conjunction at 1 50 said orbit, which is described during ihe

11 Middle

1 time of the visible eclipse at Greenwich,

52 48 Erid

3 16 20 su that the beginning, middle, end, and digits eclipsed, will be found to agree

Digits eclipsed

100 27 301" with the best observations to a

surprising

I shall here subjoin the elements of degree of exactness.

this
eclipse, for such of your readers as

may

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1815.] Mr. Parry, on the Principle of Bridges. may be disposed to give a geometrical rule, page 58, that (by Mechanics) the coustruction of the saibe.

weight of the semi-arch is to its pressure, The semidiameter of the

in the direction MA, as N M is to MA, Earth's disc

59' 40.08"

- see the figure. Sun's declination N. de

F creasing

50 59 39.5 Doon's true latitude N.. decreasing

44 37.9 The angle, which relative

orbit makes with ecliptic 5 42 10 ? Time of true conjunction

of Sun and Moon 1h.

51in. 27.25. Horary motion of Moon

from the Sun in relative
orbit

27 9.65
Semidiameter ofthe Moon 14 43.04
Semidiameter of the Sun 0 15 54.81
Sum of seinidiaineters of
Sun and Moon

30 37.85 The longitude of Sun and

Moon at cunjunction 164 47 41 Horary motion of Moon in longitude

29 27.38

GEL Horary motion of Sun in

Now, with all due deference to those longitude

2 25 8 superior acquirements, I contend, that Horary motion of Moon

Diechanics will not bear him out; for a io latitude

Turpatu
41.94

line, drawn from N to A, will not meet As the tract of this er a incie the angle of abutment at right angles to pally confined to Europe, er, namelyink it, which is required it should do hy Mee that an accurate delineative co Grmarish chanics; neither will this line be in the of the penumbra, engraved, pon a map line in that direction will be a tangent tu

direction of the initial pressure, for a of that quarter of the world, would not

Besides the be uninteresting to many curious persons, the arch, as the line Na. who could then see, ät one view, the line NA intersects the curve, and is a progress of the greatest eclipse we shall chord to part of it above A, instead of a have in these parts, for many years to tangent, and consequently can no-where, THOMAS SRUIAL.

within the linits of the coussoir, meet a Epping, Dec. 30, 1812.

radius of curvature at right angles. But the line Na is a tangent to the curve,

and consequently in the direction of the To the Editor of the Monthly Magazine. initial pressure, and the radius of curva

ture V B, at the point of contact, is at SHALL

once more, with your pero right angles to it; and then (by Mechayour valuable Magazine, with a few ob- virtually the angle of abutment, which servations on a similar subject to what I must be transferred, or supposed to be, have heretofore. But the author, from to the pier at a, where this line intersects whom I now venture to differ in opi- the vertical line I I., or face of that pier, nión, is so far my superior in physico- and that intersection will be the height mechanical acquirements, that it is with of ihe same to calculate trom, as will the the utmost diffidence I enter upon the vertical distance frown thence to the line task, although, froin an attentive exami- DN, continued=Nm, be the measure nation of the subject, I am persuaded of the vertical pressure for that purpose; that I have truth to support ine; and, and from those measures, together with being thus supported, I am encouraged the area of the semi-arch = 809, the effito proceed, notwithstanding the great cacious force of the arch, to overset the disparity above-mentioned.

pier, may be obtained by the rules given Dr. Hutton, in bis Principles of in that work Bridges, Sec. iii. Prop. x. has, as it apo Secondly, the whole resistance of the pears to me, fallen into more than one pier is there stated to be only what will error. For, first he lays it down as a arise froin the multiplication of its area,

come.

SIR,

I Chisioh,

1045 1"

SJ

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intohalf its thickness, that is, GLXFE his well-known abilities as a mathemas. XEG. But, with the same respectful tician, would have induced me also to deference as before, I again contend, think I was wrong, were I not convinced, that the sum of this resistance is equal to both by theory and practice, that I ani GLX FEXEG*LG X area of seni- right. But we are now both before a arch; for, as the weight of the whole arch discerning public, and it is for them to and covering must act upon the inside decide. faces of the two piers, the weight of the Here, Mr. Editor, I shall close this semi-arch must act upon the inside face subject, and likewise our correspondence, of one; and, this being admitted, I shall for the present, as I know of nothing refer to Example the second, in the same more that appears to me very reprehen. proposition, and compare results. sible, or likely to mislead my brother

By the admeasurements, as there set bridge-builders in their pursuit to attain down, the distance of the centre of gra. knowledge in their protession. But, if vity from D, or DN, is 33.58 feet, tiine and other circumstances will perwhich answers to the tangent of 33° 15' mit, I intend in another shape to furnisha of the curve D A nearly, and conse- them with every information I am caquently the other tangent in the direc. pable of affording them, both in theory tion of the initial pressure being the same and practice. And now, with thanks from the point of contact at B to N, the for the indulgence I have received from whole quantity of the curve to be con- you, I conclude. sidered as an arch, is 66° 30'. But the

JAMES PARPY, Bridge-builder. whole curve, from the apparent angle of Bridgeaater, Dec. 24, 1812. abutment at A to D, is 770 20', and 77° 20' - 66° 30 = 10C 50', por

To the su əsdijiy the Monthly Magazine. tion of the curve, which cannot be pro. perly considered as part of the arch, in

too much gratified with

the al is 5' 1 ng account of the Hoe It will be found by calculation, that nourzygo 1' 18 'avendish, in your Num. the distance between the apparent and be in latitur last, to be inclined to virtual angle of abutment, will be equal feit 16-647". 'ith it; but there is one to 224 feet; therefore the height of the staceiteni at that memoir which is cal. pier 10 calculate from, will be 18 +2.24 culated to make a wrong impression, = 20 24, and N M 40 — 2.24= 37.76, and which a desire to do justice to my =Nm. MA= 16:42, and area = 809, excellent friend, Dr. Hutton, induces me remaining the same. Then, from those to correct. The assertion to which I data, and the whole height of the pier advert is, that, at the top of column 2, = 64, its thick sess may be deduced, and page 421, where the deterinination of the it will be found 10 be 0-912 feet, little mean density of the earth is ascribed to more than half the thickness of Dr. Huse Dr. Maskelyne, and no mention whatever ton's pier, which is 13.07 feet. Not- is made of Dr. Hutton, though he was withstanding, the efficacious force of the undoubtedly the first person who ascer. arch is greater by our method than by tained that point. Had Dr. Maskelyne

809 X 16.42 been living, I a!n persuaded that dishis: for by our's it is

37.70

X tinguished astronomer, and truly aimjalle

bis 20.24 = 7120.432, and by

man, would not have suffered so mis

taken an assertion to poss without cor809 X 16.42 -X 18=5976.

rection: but, as he has passed to other 40

regions, and higher employments, and as Such opposite differences in cause and Di. Hutton is, I believe, too much eneffect almost stacgers belief, and, upon gaged in other concerns at present to merely a superticial view of the subject, enforce bis own claims, perhaps you will Teluses its assent, to what I conceive to indulge ime with the insertion of the have been made sufficiently clear; and following basty sketch of the leading those doubts will be further strengthened proceedings relative to the matter when we recollect that the second edition question. of Dr. Hutton's work was published If the attraction of gravity be exerted, after a lapse of twenty-nine vears, from as Newton supposed, not only between the publication of the first; and at a time the large bodies in the universe, but bewhen the Commons of the United King. Iween the minucest particles, of whicla dom had applied to him for his opinion those hodies are constituteil, it becomes upon the subject. This, together with exceedingly probable that the irregula.

Bilic's

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