Show WHAT CLIMATE AND DIET WILL DO I Unquestionably the human h man skin has bas changed In the progress of ot man from an earlier day to the present Apparently all nil races of man inan roan have developed from a com com- won oton inon ancestry the diverse types being the result of adaptations to different dl erent environments In the course courso of f thousands of years It is Interesting to know that the length of prenatal life lICe in man and in the higher apes Is approximately days whereas In the lower tower apes it Is days An An- Anthropologists Anthropologists are Inclined to be be- believe believe lieve that thai the GO CO days days' difference differences Is s required for the growth of the brain brain and head of man which are the parts of man that differentiate him from the lower animals In the development dev dei of man manfrom manfrom manfrom from a lower his present form orm he changed his diet The eating of fleshy foods provides pro larger Luger and ane an more more rapid supply of heat than did the foods which nan man man formerly ate One of the functions functions' of o the skin skins is s to permit the evaporation ev of heat from the body so 80 as to secure a constant temperature within A strong active man In a cool cli ell climate climate mate may emit calories of heat per day whereas the man in ina ina a a sedentary life liCe under tropical conditions will emit only 1500 calories of heat beat In a consideration of o the relationship hJ of f 0 the t character ch of f the skin in its relationship to ques clues questions of race and health Prof it II i. i J. J Fleure of the University College of Wales points out out that the darker colorings of the skin occur where the ha suns sun's rays arc are most ful but that it Is im ha- impossible possible to classify races of men menon menon menon on this point alone because migra migration tion conquest and other factors have modified this point as s well He believes that tile the earliest types of men had brown skins the pigment being developed soon after alter birth as a resultant action of the skin to the tho influence of o light light The earliest forms of men also bad had hairy skins and indeed the new born baby bab of today Is to be covered with a slight slight- slightly ly lr downy coat coaL In Africans the hair on the skin disappears and there is little tittle of it it such skin skin permitting more rapid evaporation of ot heat than one which is covered cov red with hair belr Indeed the whole Negro legro or or- organism organism as pointed out by b Prof Fleure seems to be specialized to tho the maximum amount of emission of heat and this is par par- particularly particularly the case c se In regions of moist heat and cloud Where the heat is of the dry type trpe there Is a D. tendency toward brown coloring It is likely that the earliest men had pigmented skins since theories have has been developed to account for tho de- de pigmentation of ot later laler types Part of this resulted from travel Into tto districts of lessened heat An additional factor suggested by one oneo observer o server Is Ia the face that persons Who ho travel north would change chan e to toa A A. diet containing a considerable amount of sat salt and salted foods and that this had to do also with tie t e disappearance of pigmentation of o the skin In his discussion of the the sub sub- sub subject j ct Prof Fleure points out that the fairest skinned Europeans have ave a high power of heat evaporation atlon Uon and an activity of body and mind I mind that is more suited to rural It an to town conditions J I This type is free from serious when hen it remains In jibe Ithe country but Is prone to the Id disease sease when depressed Into in in- industrial d conditions The character o I ot the skin and hair is Itself an anI an indication I of the general generel const const- t |