PHYSIOLOGY. 



facts contained in this hypothesis an: The de- 

 cent of the re>i !'"'- m the lateral 



tracU; UN enuring of tin- impul-e at th- 



; . ; the < tiding of th. respJra- 

 lory fiber** like other conducting iiu-i--. in i.r- 

 niinal arboruations; and tin- diuVrvnt course of 

 .llstotlu 



ng 'ii tin- side f the 



cord wherr tin y dad origin, tin- minority crosa- 

 infflnthe protoplasmic commissure (> tl ..... p- 

 .." . ' : -.i. 



.:., :h.-d of observing the off. 

 rh*np- of external temperature on the dis- 

 charge of carbonic acid. M. S. IVmbn > ; 

 food meant of testing the power of t 

 lion in animals, | > ro vi< K>d that tin- temperature 

 of the animal, the amount of mu-cular activity. 

 and the condition of the cutaneous circulation 

 are at the same time taken into account. In 

 newly born animals the power of heat rcgula- 

 tioo varies according to the development of the 

 animal at birth. Young animnls, such as mi. . 

 rat. and pigeons, which are born Mind, naked. 

 nd helpless re.-jH.ud to external changes of 

 temperature in a way somewhat similar to that 

 ecu in cold-blooded animals: the variations in 

 the respiratory exchange and the temperature 

 of the animals are in the same direction as the 

 changes of external temperature. Theft* young 

 animals can not regulate their temperature. 

 Young animals. <>n the other hand. Mich .-- 

 i pigs and chickens, which are born in a 

 condition of high development and with protec- 

 tive coverings are able even at liirth to main- 

 tain a constant temperature, provided that the 

 changes in external temperature are not excess- 

 ive. In the first class of animals the gradual 

 nt of the power of heat regulation 

 can be followed. The activity of the animal has 

 to be considered. In adult warm-blooded ani- 

 mals and in newly U.rn animals like the guinea 

 pig and chick a low external temperature in- 

 creases the activity of the animal. In young 

 animal* which only im|erfcctly regulate their 

 temperature muwular activity' is often most 

 marked and maintained at the higher tempera- 

 ture*. The first effect of a fall of temperature 

 is often, it is true, to make the animal active, 

 bat iu movements soon become feeble, and as 

 regards their purpose are of a similar nature to 

 shivering. The development of the mv 



shivering. 



heat regulation proceeds simultaneously with 

 the development of the nervous and muscular 

 ystesas. At the same time the relation of the 

 cutaneous surface to the mass of the you, 

 sal and the presence or absence of 'pn 

 coverings are factors, but only of secondary un- 



it has been found by John Haldane in the 

 wmr* of his inquiries into the origin and 



ffbomflocative or poisonous gases met with 

 n ,- air of onal mines that the poisonous ac- 

 * rbonic oxide diminishes as the ox 

 rice reran. At a t 

 of *78*n this poi^ 

 nl to the caw of mice, The 

 the poisonous action is due to 

 that at high oxygen tension- the a ni- 

 'ft dit*nw entirely with , IK ?ar- 



iT tl 2L^L lll *?? lol>in - ThepoW 

 of carbonic oxide is entirely due 



power of combining with the li;nnoi:lobiii O f 

 I'U-cIes. and so putting : 



Hers. 



i in ulat ion. i trary to the \ i,-w th.. 

 pre\ailed since the time . 

 craft holds that the impulse of the !, 

 the chest wall is dia-t.lc. and n.-t systoli 

 that it I- the elleet tl f tin 



ing upon the flaccid and passive, hut t, 

 refilling ventricle from which the prcssi. 

 il -uppo: tares have IM. 



\perimciitcr in in- i 



n. He contend.- that in 

 all diameter- increa-e. and that win n tin 

 are inflated so as to give something In. 

 normal support to the heart, it do. 

 fn-m left to right, and thus docs not -t i 

 wall with the apex of t he left vent i 



timenl- on the elTeet of uraMty 



circulation, continued by Leonard Hill.".' 

 don, illustrate the ijuiekne-s with win 



ith even slight chan. 

 po-itioii. Turning an animal ii|> 

 lowering or rai- ,d. placing n U] 



and other change- alTcct tin- arterial prc-- 

 a marked degree. Prof. Hill has further 



that an abdominal bandage, bv merely 



loi 



eneftcially the vascul 

 musolse. 



in- the l.lood supply to the lower vise. 

 creases beneficially the vasculanty of l,r.-, 



f*" 



By the application of \ 



cate sphygniomanometer. \'an /iemsseii has 

 found that the normal ten-ion in the i : 

 artery is from 80 to 110 millimetres of mi 

 In a case of arterio-sclero-i^ with car 

 troi.hy.it rose to from ISO to 210 mill'!: 

 and in a case of valvular in-uflicieiicy fe. 

 millimetres, of mercury. 



The origin of the l.lood corpi; 

 by M. Wernicki to the eosinophih- layer of tho 

 canccllous ti--ue of l.one. the granules of WsaW 

 receive a coating of ha-moi:lol.in at the 

 and then Constitute the ha-matol.las: 

 Dr. SacharolT is under-tood to hold a -imilar 

 view. As against it Siat.ocillo s<-ts the fact that 

 the rays, the blood of which contains a 

 proportion of eosinophilc cells. ha\- n< bonm 

 and therefore no cancellou- ti ue. \Vernkfl 

 thinks that all the white c<,rpu-cle- have tlic 

 same oriirin. that they are short-lived, and that 

 they a -inir from the cells by a diaj'*- 



desis nourish the bones. 



The views of Keller, expressed -rural yefp 

 ago,as to the con-tancy of the al'-olute ijiiantV 

 of Mood in the cranial c ncidi iitally 



sii|.t.orted liy the experiment"- of P,a\li anl 

 Hill to determine the relation-, i 

 pressure in the cranial cavity and the blood -uj- 

 ply to the brain. 



Results of much interest have been obi 

 by W. Halliburton. S. \V. Pickering 

 Brodie in e\|,eriments on inn.- 

 refilling fr.m intravein.us injection of . 

 artificially made colloid sub 

 corTi|H.unds closelv resemble proteid- in their 

 chief reactions. Some of them contain PJvi 

 phonis. while others are destitute of it. It M 

 anticipated that this line of n-earch rnay ca fc t 

 liirh! on intravenous clotting from disen- 

 on that induced l.y the venom of -n. 



The studies of W. Hannsen on th 



