570 EXPERIMENT STATION RECORD. 



general questions as the composition of food, tlie principles underlying its use, 

 and the scientific reasons why a change of diet is desirable in certain diseases 

 and ways for arranging such special diets in a practical manner. 



Good things to eat, R. Estes {Chicago, 1911, pp. 1^/2, j)L 1). — A large number 

 of recipes are given for soups, meat and fish dishes, vegetables, desserts, etc. 

 The book embodies the author's practical experience in connection with din- 

 ing-car and restaurant cookery, and it is noticeable that many of the dishes 

 can be prepared from such stores as might be part of the equipment of a din- 

 ing car. 



The successful home cook, Lucy H. Yates (London [1910], pp. VIII+2J,3). — 

 Many recipes are included for pastry and desserts as well as for meat dishes, 

 though the bulk of the volume is devoted to a discussion of methods of pre- 

 paring food and to the consideration of general housekeeping problems. 



This book is written from the standpoint of English methods of housekeep- 

 ing. However, the author's discussions of economy and other topics are of 

 general application. 



The respiration calorimeter and the results of experiments with it, C. F. 

 Langworthy and R. D. Milner (U. /S'. Deijt. Agr. Yearbook 1910, pp. 307-318, 

 pis. 2). — The construction and operation of the respiration calorimeter in its 

 improved form are described. 



"As regards construction, the distinguishing feature of the apparatus is an 

 air-tight and heat-tight metal-walled chamber, with outer insulating walls, 

 which is of a size suitable for experiments with man. The chamber is equipped 

 with conveniences so that the subject may remain in it for long periods if need 

 be. Air circulation through the apparatus is provided for, the respiration 

 products being removed and oxygen added as required. The respiratory prod- 

 ucts and other excretory products are measured and analyzed in comparison 

 with the food supply, the oxygen consumption is determined, and also the total 

 energy (i. e., heat) output of the body. With this apparatus it is therefore 

 possible to study the complete balance of income and outgo of matter and 

 energy in the body, to measure the respiratory quotient — that is, the ratio 

 between oxygen consumption and carbon dioxid excretion — and to study other 

 indexes of body change. 



" Control tests have shown that even in experiments of long duration the 

 measurements which are made are as accurate as those obtained in the analysis 

 of small quantities of material by the usual laboratory methods. It seems fair 

 to conclude that the respiration calorimeter is to be regarded as an instrument 

 of precision, useful for the study of everyday problems as well as those of 

 scientific interest." 



See also a previous account (E. S. R., 24, p. 601). 



A method for determining the total respiratory exchange in man, C. G. 

 Douglas (.Jour. Physiol., Jf2 (1911), No. J,, pp. XVII, XVIII, dgm. i).— The 

 author describes a mouthpiece and gas bag for collecting respiratory products, 

 which may be worn by the subject, and designed for experiments of short 

 duration. The advantages claimed are the lightness of the apparatus, its 

 portability, ease of adjustment to the subject, and the fact that " the nec- 

 essary manipulations can be done by the subject himself without external help. 

 The method is equally adapted for determining the total respiratory exchange 

 during rest and under conditions of even violent muscular work, such as run- 

 ning, and is particularly suitable for the examination of clinical cases." 



The increase in metabolism due to the work of typewriting, T. M. Car- 

 penter (Jour. Biol. Chem., 9 (1911), No. 3-4, pp. 231-266). — Continuing earlier 

 work (E. S. R., 21, p. 568), respiration calorimeter experiments were made with 

 5 subjects, including both men and women. 



