'>-''< PROCEEDINGS OP TnE AMERICAN ACADEMY 



PROFESSOR THEODORE W. RICHARDS. 



Grants of October 12, 1898, $200, for the construction of a microkine- 

 toscope, the immediate application of which is to be a study of the birth 

 and growth of crystals; and January 10, 1900. $100, for a research on 

 the transition point of crystallized salts. 



•• I have ha<l the honor of receiving two grants from the Rumford 

 I and, the accounts of which have not been closed. 



"The first was given for the study of crystal growth by instantaneous 

 photography. Upon this research I have already made several reports, 

 [laving pushed the photographic study of the growth of crystals in 

 a«pieous solutions to the furthest limit which seemed possible without a 

 very much greater expenditure of money, we have turned our attention 

 to the study of the change of the crystalline structure of iron and steel at 

 a red heat. We have been able so to modify our apparatus, with very 

 slight extra expenditure, that such study seems to be possible. 



"The second grant of money was for prosecuting a research on new 

 fixed temperatures for thermometric standardization. Of this grant only 

 $27.50 have thus far been spent for materials which have not yet been 

 exhausted. We have succeeded in showing that the transition tempera- 

 ture <>f sodic chromate is \i'ry near 19.88 . but the exact point cannot 

 be fixed until our thermometers have arrived from the Bureau Interna- 

 tionale. These new thermometers are to be the property of the College. 

 hence all the remainder of the Rumford grant ^-slUO — $27.50 = $72.50) 

 will be available for the special purposes of this particular investigation." 



PROFESSOR WALLACE C. SABINE. 



Grants of January 12, 1898, $400, and .March L5, L899, $200, for 



ircln's on ultra-violet radiation. 



Professor Sabine states that Mr. Lyman, who is engaged upon the 



investigation, "will publish a paper on a by-product of the investigation 



which Beems to m<- very interesting and important. In this paper he 



proposes to how that among the spectra formed by the Rowland con- 



gratings there are spectra not accounted for by the ordinary 



theory of tic grating; that Mich Bpectra are c Minn in, and at times fairly 



strong and of excellent definition ; that these spectra are diffraction spec- 



.! much 1 688 dispersion than the ordinary recognized spectra, and that 



the errors of ruling to which they are due are not local but general to 



the whole surface of the grating He will also explain an experimental 



method of BOrting out these lines from tic regular and calculable spectra. 



