Opinion of the Court.

The matters principally relied on by the Dueber Company, as proving the contract sought to be enforced, are a conversation between Dalzell and Dueber at the time of raising his wages in November, 1884; another conversation between them in the spring of 1885; and oral promises said to have been made by Dalzell in the summer of 1885, to assign to the Dueber Company his rights to obtain patents. It will be convenient to consider these matters successively.

The bill alleges that Dalzell's wages were raised in November, 1884, at his request, "and in consideration of a promise then made by said Dalzell to " the Dueber Company "that in the future his services would be of great value in the devising and perfecting of such tools," and that, "in pursuance of said promise and contract," Dalzell continued in the company's employ, at its expense, and with the assistance of its workmen, to devise and construct such tools.

Dueber's whole testimony on this point appears in the following question and answer: "Qu. Please state the circumstances which induced your company to increase Mr. Dalzell's wages at the time they were increased. Ans. Mr. Dalzell came to me in the office, and he says, 'Mr. Dueber, a year is now up since I worked for you in this factory. I suppose you are satisfied with the improvements I have made, and I have come to have my wages raised, and I will show you that, if you raise my wages, the improvements I will make this year will justify you in doing so.' I asked him what wages he wanted; he said 'thirty dollars per week,' and he was paid that until the time he left. When that year was up, nothing was said about wages."

This testimony tends to show no more than that Dalzell expressed a confident belief that, if his wages should be raised, the improvements which he would make during the coming year would justify the increase. It has no tendency to prove any such promise or contract as alleged in the bill, or any other promise or contract on Dalzell's part. So far, therefore, no contract is proved, even if full credit is given to Dueber's testimony.

As to what took place in the spring of 1885, the bill alleges

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that, subsequently to the aforesaid interview, "and when said tools were completed," Dalzell requested the company to apply, for its own use and benefit, for patents for inventions which he represented that he had made "while engaged in designing and constructing said tools," and which, he suggested, might, if not secured by letters patent, be made known and explained by some of the workmen then employed there to rival companies; and, as a further inducement to the company to have such patents applied for, voluntarily offered, if the company would permit him to do so, and would pay all expenses of obtaining patents, to apply therefor, for the benefit of the company, and "not ask or require any further or other consideration for said inventions and such letters patent as might be granted thereon;" and that this proposition was "then and there accepted by" the company, and "it was then fully agreed between said parties" that Dalzell should immediately proceed, through a solicitor of his own selection, to procure the patents in the name of the company, and the company should pay the necessary expenses.

Upon this point, Dueber's testimony was as follows: "Qu. Who first suggested the idea of patenting these devices, and when? Ans. Mr. Dalzell, in the spring of 1885. Qu. Please state all that took place at that time. Ans. Mr. Dalzell came to me and said, 'Mr. Dueber, we have got a very good thing here; let us patent this for the benefit of the concern; we have some men here, who may run away and carry those ideas with them.' I objected at first; finally he says, 'If you will pay for getting them out, I don't want anything for them.' I then said, 'Let us go over to Mr. Layman to-morrow, and attend to it.' He said he knew a more competent lawyer than that, that he would send for." Dueber also testified that, when Dalzell first suggested taking out letters patent, Dueber told him that he did not think the improvements of sufficient value to justify taking out patents and paying for them; and that "about all" that Dalzell replied was, "We have a good many men here who may carry off these ideas into other shops, and I want to retain them for this concern."

All this testimony of Dueber was given in September, 1886,

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before the filing of the bill for specific performance. Being recalled, after this bill had been filed, he testified, on crossexamination, that he now considered the inventions covered by the patents sued on as valuable, because the company had spent a great deal of money on them; and he declined or evaded giving any other reason.

Bearing in mind that there was no proof whatever of any previous agreement between the parties on the subject, the contract as alleged in the bill and testified to by Dueber, by which Dalzell is said to have voluntarily offered, with no other motive than to prevent workmen from injuring the Dueber Company by communicating the inventions to rival companies, and for no other consideration than the payment by the Dueber Company of the expenses of obtaining patents, and without himself receiving any consideration, benefit or reward, and without the company's even binding itself, for any fixed time, to pay him the increased wages, or to keep him in its service, is of itself highly improbable; and it may well be doubted whether, if such a contract were satisfactorily proved to have been made, a court of equity would not consider it too unconscionable a one between employer and employed, to be specifically enforced in favor of the former against the latter. Cathcart v. Robinson, 5 Pet. 264, 276; Mississippi & Missouri Railroad v. Cromwell, 91 U. S. 643; Pope Manuf. Co. v. Gormully, 144 U. S. 224.

Moreover, Dueber throughout manifests extreme readiness to testify in favor of the theory which he is called to support, and much unwillingness to disclose or to remember any inconsistent or qualifying circumstances. The record shows that he has at different times made oath to four different versions of the contract:

1st. On March 16, 1886, when the Dueber Company filed a petition in the superior court of Cincinnati against Dalzell to compel him to assign his patents to it, Dueber made oath to the truth of the statements in that petition, one of which was "that, at the time of the making of application for said patents, it was agreed, for a valuable consideration before that time paid, that said patents and inventions were the property

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of this plaintiff, and should be transferred to it immediately upon the issue thereof, and prior to the grant of the patents." 2d. On June 4, 1886, he made oath that the plea was true in point of fact, which stated that the whole contract, both for an increase of Dalzell's wages and for his assignment to the Dueber Company of his rights to patents for his inventions, was made "prior to any alleged invention by said Dalzell," and in consideration of an increase of wages to be thereafter paid.

3d. In September, 1886, he testified that the increase of wages was made upon the mere statement of Dalzell that he would show that the improvements he would make during the coming year would justify the increase; and that the subsequent contract to assign the patent rights was after the inventions had been made.

4th. On January 17, 1887, he made oath to the truth, of his own knowledge, of this bill, which alleged that Dalzell's wages were raised "in consideration of a promise" by Dalzell "that in the future his services would be of great value in the devising and perfecting of such tools," and also alleged that the agreement to assign the patent rights was made after the inventions.

Dalzell, being called as a witness in his own behalf, directly contradicted Dueber in every material particular; and testified that the real transaction was that, after his inventions had been made, and shown to Dueber, the latter was so pleased with them that he, of his own accord, raised Dalzell's wages, and offered to furnish the money to enable him to take out patents. There is much evidence in the record, which tends to contradict Dalzell in matters aside from the interviews between him and Dueber, and to impeach Dalzell's credibility as a witness. But impeaching Dalzell does not prove that Dueber's testimony can be relied on.

What took place, or is said to have taken place, after these interviews may be more briefly treated.

Whitney, the solicitor employed at Dalzell's suggestion, applied for and obtained the patents in Dalzell's name, and was paid his fees and the expenses of applying for the patents

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by the Dueber Company with Dalzell's knowledge. In the summer of 1885, before the patents were issued, he sent blank assignments thereof to the Dueber Company to be signed by Dalzell, which Moore, the general manager of the company, as well as Dueber, in the absence of each other, asked Dalzell to sign.

Upon what Dalzell then said, as upon nearly every material point in the case, the testimony is conflicting. Dueber and Moore testified, in accordance with the allegations in the bill, that Dalzell replied that he would not sign any of them until all the patents had "passed for issue," and would then sign all together. But the manner in which they testified to this does not carry much weight. And Dalzell testified that he positively refused to assign the patents until some arrangement for compensating him had been agreed upon.

Parts of a correspondence of Whitney with Dueber, and with Dalzell, during the summer of 1885, were put. in evidence, which indicate that Whitney, while advising Dalzell as to his interests, sought to ingratiate himself with the Dueber Company. But they contain nothing to show any admission. by Dalzell that he had agreed, or intended, to assign the patent rights to the Dueber Company, without first obtaining some arrangement whereby he might be compensated for his inventions.

The Circuit Court, in its opinion, after alluding to various matters tending to throw discredit on the testimony of each of the principal witnesses, said, "The case is one on which different minds may well reach a contrary opinion of the merits." 38 Fed. Rep. 599. We concur in that view; and it affords of itself a strong reason why the specific performance prayed for should not be decreed.

From the time of Lord Hardwicke, it has been the established rule that a court of chancery will not decree specific performance, unless the agreement is "certain, fair and just in all its parts." Buxton v. Lister, 3 Atk. 383, 385; Underwood v. Hitchcox, 1 Ves. Sen. 279; Franks v. Martin, 1 Eden, 309, 323. And the rule has been repeatedly affirmed and acted on by this court. In Colson v. Thompson, Mr. Justice Washing