566 



EXPERIMENT STATION RECORD. 



[Vol.43 



" It is siifjgestefl that the acidosis may be beneficial, because It accelerates 

 the reduction of the blood in the capillaries and thus facilitates the respiratory 

 function of the blood. It is further susf^ested that an alkalosis of the blood 

 may cause mountain sickness or contribute to the pathology of that condition 

 by retarding the blood reduction." 



V. Effect of high altitudes on salt metabolism, with special reference to the 

 mechanism of maintaining the acid-base equilibrium of the body (pp. 121-132). — 

 By computing the intake and output of acids and bases on a uniform diet in 

 terms of n/10 solutions, an increase of the base output was observed at an 

 elevation of 3,100 meters. This excess elimination of bases was in the form of 

 fixed alkalis. In a case of mountain sickness at an altitude of 4,300 meters, 

 the increase of base excretion was delayed. 



It is suggested that the excessive base output was partly due to the elimina- 

 tion of bicarbonates and partly to salts of strong fatty acids, the increa.se in 

 base excretion being the main mechanism in restoring the reaction of the blood 

 disturbed by the loss of CO2. 



Dried milk powder in infant feeding, W. H. Price {Pub. Health Rpts. 

 [U. S.], 35 (1920), No. U, pp. 805y-8;^S).— Safety, usefulne.ss, and comparative 

 value of dried milk powder in infant feeding are discussed in this preliminary 

 report of investigations carried on by the U. S. Public Health Service cooperat- 

 ing with the Boston Baby Hygiene Association, the Boston Health Depart- 

 ment, and other agencies. 



Three groups of infants were fed under comparable conditions : The first 

 with grade A milk, which contained 4 per cent of fat, 4.8 per cent of sugar, 

 and 3.18 per cent of protein ; group 2 with modifications prepared from whole 

 milk powder, dispensed by nurses and reconstituted in the homes according to 

 directions, containing 4 per cent of fat, 5.7 per cent of sugar, and 3.71 per 

 cent of protein ; and group 3 with modifications prepared from milk which 

 was reconstructed from unsalted butter and skimmed milk powder, containing 

 4 per cent of fat, 5.1 per cent of sugar, and 3.1 per cent of protein. " Some 

 difficulty was experienced in obtaining a perfect emulsion of the unsalted 

 butter and powdered skimmed milk. A thin float of fat appeared on the 

 surface of tlie milk in the necks of the bottles in which the milk was delivered, 

 and this difficulty was never entirely overcome. This loss of fat was com- 

 pensated for, however, so that the remaining emulsion contained the required 

 4 per cent, and the float was removed and discarded. It is believed that the 

 ingredients and the machine used in this study are capable of producing better 

 results than we obtained, but it is doubtful if better results are likely to be 

 obtained in commercial practice at the present time." 



Experimental data reported are summarized in the table which follows : 



Results of feeding experiments comparing dried milk powders with ichole milk 



in infant feeding. 



As regards safety, " such laboratory analyses as were made indicate that 

 the dry milk powders and their remade products used in this study are safe 

 for infant feeding." 



