"The ordinary tests of generosity are very defective. As rightly measured, generosity is great in proportion to the amount of self-denial entailed; and where ample means are possessed, large gifts often entail no self-denial. Far more self-denial may be involved in the performance, on another's behalf, of some act that requires time and labor. In addition to generosity under its ordinary form, which Professor Tyndall displayed in unusual degree, he displayed it under a less common form. "He was ready to take much trouble to help friends. I have had personal experience of this. Though he had always in hand some investigation of great interest to him, and though, as I have heard him say, when he bent his mind to the subject he could not with any facility break off and resume it again, yet, when I have sought scientific aid, information or critical opinion, I never found the slightest reluctance to give me his undivided attention. Much more markedly, however, was this kind of generosity shown in another direction. Many men, while they are eager for appreciation, manifest little or no appreciation of others, and still less go out of their way to express it. "With Tyndall it was not thus; he was eager to recognize achievement. Notably in the case of Michael Faraday, and less notably, though still conspicuously in many cases, he has bestowed much labor and sacrificed many weeks in setting forth the merits of others. It was evidently a pleasure to him to dilate on the claims of fellow workers. "But there was a derivative form of this generosity calling for still greater eulogy. He was not content with expressing appreciation of those whose merits were recognized, but he used energy unsparingly in drawing the attention of the public to those whose merits were unrecognized; time after time in championing the cause of such, he was regardless of the antagonism he aroused and the evil he brought upon himself. This chivalrous defense of the neglected and ill-used has been, I think by few, if any, so often repeated. I have myself more than once benefited by his determination, quite spontaneously shown, that justice should be done in the apportionment of credit; and I have with admiration watched like actions of his in other cases: cases in which no consideration of nationality or of creed interfered in the least with his insistence on equitable distribution of honors.