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SCIENCE 



[N. S. Vol. XLIV. No. 1144 



but also to awaken many a slumbering soul to 

 a larger and nobler life. By precept and ex- 

 ample lie set forth, worthy ideals of virile 

 scholarship, of genuine religion, of civic, na- 

 tional and international righteousness. His 

 spirit, reverent and fearless and tolerant, lov- 

 ing and loyal, still lives in his disciples. Who 

 shall say when its workings will end? His 

 place in the history of speculative philosophy 

 is secure. He, being dead, yet speaketh, and 

 we have no need to grieve. But in the fresh 

 sorrow for our loss, we mourn for Boyce as 

 the man and the moulder of men. 



THE SCIENTIFIC EXHIBIT OF THE NA- 

 TIONAL ACADEMY OF SCIENCES 



At the recent meeting of the National Acad- 

 em of Sciences at Boston, there were arranged 

 at the Massachusetts Institute of Technology, 

 an interesting series of scientific exhibits, 

 which were explained by the exhibitors in 

 person. The exhibits were as follows : 

 H. S. White, Vassar College. Graphic representa- 

 tions of triad systems. 

 Frank Schlesinger, Allegheny Observatory, Alle- 

 gheny, Pa. Photographs of Jupiter. 

 Miss A. J. Cannon, Harvard College Observatory. 



Stellar spectra. 

 Leon Campbell, Harvard College Observatory. 



Visual observations of variable stars. 

 Miss H. 8. Leavitt, Harvard College Observatory. 



Photographic magnitudes. 

 Solon I. Bailey, Harvard College Observatory. 



Variable stars in clusters. 

 A. G. Webster, Clark University. Acoustical 

 measuring apparatus: standard phone, phonom- 

 eter and phonotrope. Application of a drop 

 chronograph for use in ballistics. 

 Charles A. Kraus, Clark University. A new 



vacuum pump and a new thermostat. 

 H. P. Hollnagel, Massachusetts Institute of 

 Technology. Methods of isolating the infra-red 

 region of the spectrum. 

 Alexander McAdie, Blue Hill Observatory. Cloud 



studies, wind structure and snow flakes. 

 Ellsworth Huntington, Milton, Mass. The re- 

 lation between solar changes and barometric 

 gradients. Optimum temperature for the hu- 

 man race. 

 Eobert DeC. Ward, Harvard University. Weather 

 types of the United States, illustrated by com- 

 posite weather maps and instrumental records. 



R. A. Daly and H. Clark, Harvard University. 

 Design for a deep-sea thermograph. 



Frank Hall, Massachusetts Institute of Technol- 

 ogy. A thermophone arranged so that direct 

 comparison may be made with a magnetic re- 

 ceiver. 



A. H. Gill, Massachusetts Institute of Technology. 

 Tests of lubricating mineral oils. 



F. G. Keyes and J. B. Dickson, Massachusetts 

 Institute of Technology. Continuous flow calor- 

 imeter for measuring heats of reaction in solu- 

 tion. 



C. L. Burdick, Massachusetts Institute of Tech- 

 nology. Determination of crystal structure by 

 X-rays. 



E. E. Wilson, Massachusetts Institute of Tech- 

 nology. Apparatus for maintaining pressures 

 of one tenth micron or less, and the investiga- 

 tion of the mechanism of chemical reactions. 



Henry Fay, Massachusetts Institute of Technol- 

 ogy. Erosion of large guns. 



Albert Sauveur, Massachusetts Institute of Tech- 

 nology and Harvard University: (1) Photomi- 

 crographie apparatus (original). (2) Photomi- 

 crographs of metals and alloys; charts and dia- 

 grams ; specimens. 



H. O. Hofman, Massachusetts Institute of Tech- 

 nology. (1) Jenny flotation machine. (2) A 

 laboratory revolving horizontal roasting furnace 

 heated electrically and rotated in the same way. 



A. E. Kennelly and Associates, Massachusetts In- 

 stitute of Technology. Researches in electrical 

 engineering. 



Alexander Klemin, Massachusetts Institute of 

 Technology. Aeroplane models used in wind 

 tunnel. 



W. Lindgren and W. L. Whitehead, Massachu- 

 setts Institute of Technology. Photomicro- 

 graphs of silver ores from Chile and Tintic. 



C. H. Warren, Massachusetts Institute of Tech- 

 nology. (1) A graduated sphere for crystallo- 

 graphic work. (2) Photographs of spherulites 

 in polarized light. 



Charles Palache, Harvard University. Models 

 showing gnomonic crystal projection. 



Wallace W. Atwood, Harvard University. The 

 former glaciers of the San Juan Mountains of 

 Colorado. The physiographic stages in the evo- 

 lution of the San Juan Mountains of Colorado. 



J. B. Woodworth, Harvard University. Glacial 

 map of Cape Cod and adjacent islands. A 

 glypolith from Nantucket. 



Laurence La Forge, U. S. Geological Survey. Re- 

 cent topographic and geologic maps of New 



