CYRUS MOORS WARREN. 401 



the mass in a hydraulic press at a tolerably definite and constant tem- 

 perature maintained by steam heat, by which means various crystalline 

 substances other than anthracene are expelled ; and Warren proposed 

 to isolate each of these compounds by a process of fractional liquefac- 

 tion or of methodized eliquation. He had gone so far as to have had 

 constructed especially for this purpose, and at very considerable ex- 

 pense, a small compact hydraulic press which carried a copper jacket 

 which was to be filled with water that could be kept at any desired 

 temperature by means of gas lamps. The diameter of the jacket was 

 enough larger than that of the plate of the press to admit of lamps being 

 put under it to heat the water. In this way the mixture of crystals 

 could be pressed again and again, at some one definite temperature, 

 until the substance which remains solid at this temperature had become 

 so pure that nothing more could be squeezed out from it ; then the 

 matters which had remained liquid at that temperature could be pressed 

 at another temperature until another substance had been isolated, and 

 so on as long as any of the material was left. This process seems to 

 have reached an eminently hopeful stage of development, when work 

 upon it was interrupted by increased business cares which followed 

 the death of his brother, Mr. Herbert M. Warren, in 1880. It is 

 evident that a manageable process of this kind would find ready appli- 

 cations in the study of waxes, fatty bodies, camphors, paraffins, and 

 some resins, as well as in that of the heavy products of tar. Possibly 

 even the very intricate problem as to the composition of the mixture 

 of oxidized fatty acids, which are concerned in the technical pro- 

 cess of currying leather, and in the old method of fixing the color 

 known as Turkey-red upon cotton cloth, might be solved in this 

 way. 



This Academy was held by Cyrus Warren in profound respect. 

 He was proud to be a member of it, and he appreciated very highly 

 the scientific atmosphere which he found here. This remark is true 

 also of our lamented associate Ferrel, whose early life had been akin 

 to Warren's in many respects. It was a great pleasure to these men 

 — independent and self-sustained though they both were — to be in 

 touch with scientific associates. They knew that here at least their 

 aspirations would be sympathized with and their efforts be justly ap- 

 preciated ; and it will be well for us all to remember how much such 

 men may be encouraged by an organization of high tone and character 

 competent to hold them steadily to their best ideals. 



In Warren's last will and testament were found written the follow- 

 ing words : — 



vol. xxvu. (n. p. xix.) 2C> 



