958 EXPEKIMENT STATION KECOED, 



perature ranged froui 'AS to (i()° F., but fell below 50° at some time during each 

 day. If the teniperatnre remains above 50° F. for 2 weeks or more during win- 

 ter, the European silkworm is likely to begin development. This can not be 

 checked, and the moths may. therefore, appear too early in the spring. Nothing 

 of this sort happened at Shillong. and the race appears to be well adapted to 

 that climate. 



In a test of large and small leaf mulberries the size and weight of the cocoons 

 were less when the large leaf variety was used for food. 



The coloring matter of the silk of Saturnia yama-mai, C. (Jautier {C(»iiitt.. 

 Kciul. ,Sue. Biol, ll'aris], 62 {1907), No. 6', ijp. 23.'f-236).—A study of the silk of 

 this species shows that it is green and that under the nucroscope, after samples 

 have been mounted in glycerin jelly, amorphous bodies .are found which are not 

 comparable to the crystals sometimes observed in large numbers in the normal 

 cocoon. 



FOODS— HUMAN. NUTRITION. 



The dynamics of living matter, ,1. Loeb (\nr Yorl,-: The Miiriiiilhni Co., 

 I'JIK). 1)1). XII -\- 2-i.i. pijs. ti'i). — This work constitutes volume ^TII of the Colum- 

 bia University Biological Series and sinnmarizes and treats of the author's 

 extensive investigations in experimental biology. The lectures include discus- 

 sions of the general chemistry of life phenomena, the general physical constitu- 

 tion of living matter, some physical manifestations of life, the role of electrolytes 

 in the formation and preservation of living matter, the effects of heat and 

 radiant energy ui)nn living matter, heliotropism, facts concerning tropisms and 

 related phenomena, fertilization, heredity, and the dynamics of regenerative 

 l>rocesses. 



Personal hygiene, AI. Le Bosquet (Cliiau/o: Aiiici'icdii ScJiool of Home 

 Ecoito))iic><, I'.xn. j)i>. \'I fl -\- 2S2, /ff/.s. 3'i). — The structure of the body, bones, 

 muscles, nervous system, etc., the running of the body machine, the digestion of 

 food, respiration, luitrition, tempei'ature reguration, the care of the body 

 machine, the hygiene of the nervoiis system, and of feeding, the care of the 

 teeth, and related (luestions are taken up in this handbook of hygiene, which is 

 designed ])riniarily as a text-book for instruction by correspondence. 



The volume as a whole constitutes a useful summary of data on this vei"y 

 important subject. 



Food and hygiene, W. Tibbles (Loii<U))i: l\vh})i(iii. Ltd.. JUdi), pp. \ H -\- 

 672). — The author has discussed food, air, and water with special i-eference to 

 the needs of physicians and their patients. Composition and digestibility of 

 food, food requirements at different ages, and under different circumstances, 

 dietetic treatment of diseases, and related questions are considered. An appen- 

 dix gives dietary standards, factors for digestil)ility. and tables showing the 

 comjiosition and fuel \alue of foods. 



The home economics movement, Isabei. Bevier and Susannah Usher (Bos- 

 ton: Wliitroiiih d- Biirroir.s, JflOC. jit. 1. iip. 67). — In this historical account of 

 the home economics movement in the United States, the authors have traced 

 its growth in agricultural colleges. State uniA-ersities, cooking schools, and 

 public schools. The information summarized is of decided importance to 

 teachers and students of home economics. 



Early attempts were made to introduce home economic branches into schools 

 of various kinds in this country. Imt tlic movement first took definite form al)out 

 1870. Among State institutions the .'! pioneers in the work were the Iowa State 

 College, the Kansas Agricultural College, and the University of Illinois. 



