Journal of Applied Microscopy. ^-^1 



This is a method for examining nerve 



Turner, John, M. B. A Method of Examinine ^^^^^ [^ ^.^eij. natural condition, unaltered 



Fresh Nerve Cells ; with Notes Concerning . , 



their Structure and the Alterations caused by any reagent except the Stain used. 



in them by Disease. Brain, Winter No., place a thin slice of cortex in a .5 per 



'* ^ ' cent, aqueous solution of methylen blue 



and leave from three to twelve hours. When stained, remove the smallest portion 



possible with a scalpel and place on a slide in a drop of Farrant's solution, or 



water — it will keep longer in Farrant's — and cover with a cover-glass, then flatten 



the preparation under the microscope with two dissecting needles. Artificial light 



is best for studying these. These preparations cannot usually be preserved more 



than ten days, and are at their best a few days after mounting. e. m. r. 



Herrick=Coghill. Note on the Methylen Blue In material impregnated with methylen 

 Process. Jour. Comp. Neur. 8: 53, 1898. ^^^^^ ^^^ ^^^.^ ^^^^^ ^^ ^^ extracted Or 



to become diffuse during dehydration with alcohol previous to imbedding. 

 To obviate this, C. L. Herrick recommends placing the object in glycerine, 

 followed by a mixture of glycerine and gum arable. After remaining in this 

 mixture for a day, it is placed in a paper tray and the mixture allowed to 

 evaporate until of a proper consistency for sectioning. e. m. b. 



RECENT LITERATURE. 



Edinger, L. The Anatomy of the Central Beddard, F. E. Contribution to our Knowl- 



Nervous System of Man and of Vertebrates edge of the Cerebral Convolutions of the 



in General. Trans, by W. S. Hall. 8vo, Gorilla. Proc. Zool. Soc. London, pp. 12, 



pp. XI -f 446, illustrated. Philadelphia, 7 figs., 1899. 



1899. 



ijal, S. 



bral 1 



pp. 63, 23 gravures, 1899. 



Coghill, G. E. Nerve Termini in the Skin of 

 Cajal, S. R. Estudios sobre la Cortezza Cere- the Common Frog. Pt. i. Jour. Comp. 



bral umana. Madrid, Rev. trim, microgr. Neur. 9: 53-63, pis. 4-5, 1899. 



NOTES ON RECENT MINERALOGICAL 

 LITERATURE. 



Alfred J. Moses and Lea McI. Luquer. 



Books and reprints for review should be sent to Alfred J. Moses, Columbia University, 



New York, N. Y. 



Cusack,R. Melting Points of Minerals. Proc. Apparatus by Joly consists essentially 

 R. Irish Acad. 5: 399, 1897. Abst. in Min. of a platinum ribbon which can be 

 Mag. 12: 49. 1898. heated by an electric current. The 



temperature is obtained by micrometer measurements of the varying length 

 of the ribbon. The substance in fine powder is placed on the ribbon 

 and observed with a microscope, until the exact moment of fusion is 

 reached. Readings can be obtained to within two degrees of temperature, and 

 the method forms an easy way of determining minerals. The fusion points 

 of forty common rock-forming minerals and ores are recorded. 



Lord Kelvin (Phil. Mag. No. 1, 1899) has obtained different results in case 

 of feldspar, mica, hornblende, and quartz. 



