and Laboratory Methods. 1423 



numerous in those organs and tissues that are exposed to bacterial invasion. 

 The eosinophilic cells of the sputum probably arise in the respiratory tract. 

 They occur in varying number in all diseases of the respiratory tract which are 

 not associated with fever. In febrile conditions they ordinarily do not appear 

 until the temperature has returned to the normal. 



For the study of the sputum Fuchs highly recommends a modification of 

 Teichmiiller's method. A thin layer of sputum is spread upon cover slips, and 

 the preparations are fixed by drawing them three times through the flame. They 

 are stained for two minutes in a 0.5 per cent, alcoholic solution of eosin, and 

 then decolorized in 50 per cent, alcohol. Everything is decolorized except the 

 red blood corpuscles, which retain the stain partially, and the eosinophilic granu- 

 lations. Counterstain with methylen blue. j. h. p. 



Meek, E. R. Method of Staining the Elastic The writer has devised a stain for 



Fibers of the Skin Boston Medical and gj^Stic tissue which she considers 

 Surgical Journal, 143: 23-24, 1900. 



superior to Weigert's method, as it is 



less complicated and requires less time. The sections are taken out of strong 



alcohol and immersed in the following solution : 



Orcein, .... 3.0 



Absolute alcohol, . . 100.0 



Hydrogen peroxide, . . 40.0 



If the sections are thin, three minutes suffice for staining. For differentiation 

 the same solution in which the orcein was dissolved is used : 



Absolute alcohol, . . KM). (J 



Hydrogen peroxide, . . 40.0 



For thin sections one minute suffices; the elastic fibers are then shown very 

 clearly, while the rest of the tissue is lightly stained. j. h. p. 



GENERAL PHYSIOLOGY. 



Raymond Pearl. 



Books and papers for review should be sent to Raymond Pearl, Zoological 

 Laboratory, University of Michigan, Ann Arbor, Mich. 



„, „, J. „, . . , or. J /- u During recent years there has been 

 Oker=Bloin, M. Thiensche Safte und Gewebe _ ° ■' 



in physikalisch-chemischer Beziehung. manifest a growing tendency to apply 



I. Die elektrische Leitfahigkeit des Blutes. ^j^e methods and laws of physical 

 Arch. f. d. ges. Physiol. 79: 111-145, 1900- 



II. Die Abhangigkeit der elektrischen chemistry tO the Study of physiological 

 Leitfahigkeit des Blutes von den Blut- problems. This series of papers by 

 korperchen. Beitrag zur Lehre von der ^ r r j 

 Leitfahigkeit der Suspensionen. Ibid. 79 : Oker-Blom forms the most extensive 



5'°7533-. i9°o- ,,...,., , ^^, and detailed contribution along this 



III. Die Durchlassigkeit der rothen Blut- ° 

 korperchen fiir verschiedene Stoffe, beur- line which has yet appeared. The 

 theilt nach der elektrischen Leitfahigkeit. fi^st paper of the series dealing 

 Ibid. 81: 167-221, 1900. ^ ^ ** 



IV. DieelektromotorischenErscheinungen with the electrical conductivity of the 



am ruhenden Froschmuskel. Ibid. 84: ^lood is introduced by an excellent 

 191-259, I90I. •' 



brief summary of the present knowl- 

 edge of solutions, from the physico-chemical standpoint. In this study the resist- 



