398 - Scientific Intelligence. 



almost unparalleled contribution to crystallography and miner- 

 alogy. 



5. Beitrage zur Krystallographie and Mineralogie; by Vic- 

 tor Goldschmidt. Heidelberg (Carl Winters Universitats buch- 

 liandlung). — It is interesting that the author of the Atlas noticed 

 above should have had the time and energy to initiate the new 

 publication of which the title is here given. Volume I of 264 

 pages, with 25 plates and 72 text figures, embraces 5 parts and 

 as now received, bears the dates from 1914 to 1918. Seventeen 

 original papers are here included; of these, one of particular 

 interest is the opening article by Professor Goldschmidt on 

 "Krystallographie and mineralogie," which gives a broad view 

 of what the science has accomplished and may look forward to 

 in the future. The first number of the second volume (1919) has 

 also been received. It embraces 4 articles covering 25 pages 

 with 7 colored plates of remarkable execution and interest. The 

 paper on the complex twins of pyrargyrite is of particular inter- 

 est especially in connection with the plates which illustrate it. 



Obituary. 



Professor John Nelson Stockwell, of Cleveland, died on 

 May 18, 1920, in his 89th year. In his death, America has lost 

 one who belonged in the group of eminent astronomers, which 

 included Gould, Hall, Newcomb, and Hill. Born near North- 

 ampton, Mass., his parents moved to Ohio in 1833, where he was 

 educated in the common schools. In 1852 he acquired Bow- 

 ditch's translation of Laplace's Mecanique Celeste, which fixed 

 his career in mathematical astronomy. 



He was closely associated for 42 years with Dr. B. A. Gould, 

 who published many of his researches in the Astronomical Jour- 

 nal; he also made numerous contributions to other journals. 

 The well known "Memoir on the Secular Variations of the Eight 

 Principal Planets" was published in 1873. Dr. Stockwell was 

 the first professor of mathematics and astronomy in the Case 

 School of Applied Science from 1881-1888, when he gave up 

 teaching to devote himself to research. His "Theory of the 

 Moon's Motion" appeared in 1875. In later years he made 

 extensive researches on eclipses since the year 3784 B. C. In his 

 88th year he published a new method for attacking the problem 

 of the ocean tides, and about the same time prepared a paper 

 on Hill 's method for finding the Maximum Lunation, which will 

 shortly appear in the Astronomische Nachrichten. 



Always of mild and gentle manner, Dr. Stockwell was much 

 beloved by a wide circle of friends, and his record of devotion 

 to pure science for 70 years is one which has left a lasting im- 

 pression on his time. T. J. J. See. 



M. Armand Gautier, the distinguished French chemist, died 

 at Cannes a few months since in his eighty-third year. 



