79 



MOUNTING AND LABELING. 



A Catalog Card Written According to 

 this Formula : 



i. Striated Muscular Fibers. Cat. 



2. No. 475, (Drr. IX) Oct. i, 1S91. S. 

 H. G., Preparator. 



3. Tendinous and intra-muscular ter- 

 minations of striated muscular fibers 

 from the Sartorius of the cat {Felis do- 

 me stica). 



4. Cat eight months old, healthy and 

 well nourished. 



5. Muscle pinned on cork with vas- 

 elined pins and placed in 20 per cent, 

 nitric acid immediately after death by 

 chloroform. Left 36 hours ; tempera- 

 ture 20 C. In alum water (sat. aq. sol.) 

 1 day. 



6. Fibers separated 011 the slide with 

 needles. 



7. Stained 5 minutes with Delafield's 

 haematoxylin. 



8. Mounted in glycerin jelly {\ 174). 



9. Use 18 mm. for the general appear- 

 ance of the fibers, then 2 or 3 mm. ob- 

 jective for the details of structure (§ 75). 

 Try the micro-polariscope ($ 157). 



10. The nuclei or muscle corpuscles 

 are very large and numerous ; many of 

 the intra-muscular ends are branched. 

 See S. P. Gage, Proc. Amer. Micr. Soc, 

 1890, p. 132 ; Ref. Hand-Bk. Med. Sci., 

 Vol. V., p. 59- 



\ 182. General Remarks on Catalogs and Labels. — It is especially desirable 

 that labels and catalogs shall be written with some imperishable ink. Some 

 form of water-proof carbon ink is the most available and satisfactory. The water- 

 proof India ink, or the engrossing carbon ink of Higgins, answers very well. 

 As purchased the last is too thick for ordinary writing and should be diluted with 

 one third its volume of water and a few drops of strong ammonia added. 



If one has a writing diamond it is a good plan to write a label with it on one end 

 of the slide. It is best to have the paper label also, as it can be more easily read. 



The author has found stiff cards, postal card size like those used for cataloging 

 books in public libraries, the most desirable form of catalog. A specimen that 

 is for any cause discarded has its catalog card destroyed. New cards may then 

 be added in alphabetical order as the preparations are made. In fact a catalog 

 on cards has all the flexibility and advantages of the slip system of notes (see 

 Wilder & Gage, p. 45). 



General Formula for Cataloging Mi- 

 croscopical Preparations : 



1. The general name and source. 



2. The number and date of the pre- 

 paration and the name of the preparator. 



3. The special name of the prepara- 

 tion and the common and scientific 

 name of the object from which it is de- 

 rived. 



4. The age and condition of the object 

 from which the preparation is derived. 



5. The chemical treatment, — the 

 method of fixing, hardening, dissociat- 

 ing, etc. 



6. The mechanical treatment, — im- 

 bedded, sectioned, dissected with nee- 

 dles, etc. 



7. The staining agent and the time re- 

 quired for staining. 



8. Dehydrating and clearing agent, 

 mounting medium, cement used for 

 sealing. 



9. The objectives and other accesso- 

 ries (micro-spectroscope, polarizer, etc.) 

 for studying the preparation. 



10. Remarks, including references to 

 original papers, or to good figures and 

 descriptions in books. 



