150 NOTES AND MEMORANDA. 



up the colouring matter. This is to he observed from tlie fourth 

 day. 



3. No indigo pigment is deposited in the bone-colls. 



4. The ijigment is found in the cartilaginous tissue, e. g. the 

 articular cartilage of the hip-joint, from the fifth day onwards. None 

 is found in the ground-substance or matrix. 



5. The nerve-cells never contain the indigo ; only in a few cases 

 was it found in the sympathetic ganglion-cells between the cell- 

 contents and the sheath. 



G. The blue coloration of the epithelial cement pointed out by 

 Thoma and Kiittnor is also true for that of the so-called endothelium. 



NOTES AND MEMOEANDA. 



Mounting Ostracoda in a Permanent Manner. — Mr. E. Gardner 

 gives the following mode, in the January number of the ' Journal of 

 the Quekctt Club.' He says : — " I have been trying for a long time 

 to mount the Ostracoda and allied genera in a permanent manner, and 

 having at last fancied that I have succeeded, as my slides show no 

 alteration after some mouths, I beg to comnmnicate my method, in the 

 hope that other young microscopists will improve upon it, and give 

 the results of their experience. I found tliat fluid media were of no 

 use, as endosmose, sooner or later, destroyed tlie objects, which do not 

 admit of being dried for mounting in resinous media. I therefore 

 tried a mixture of two-thirds gum arable and one-third syruji, made 

 with loaf-sugar with a few drops of alcohol and creosote, and a little 

 corrosive sublimate. I found that a drop of this mixture hardened 

 sufficiently in about two days to imbed and preserve the object, and 

 to admit of the cell being filled up with gum dammar in benzole. I 

 use that prepared by White, of Litcham, in collapsible tubes. Should 

 the object show above, or project through the first coat of gum when 

 hardened, more must be dropped in, until it is quite imbedded. The 

 object is then covered with thin glass. My reason for mixing the 

 syrup with the gum arable is merely to prevent the gum from cracking 

 or contracting too much when dry." 



Officers of the American Microscopical Society. — We are re- 

 quested to state that at the annual meeting of the American Micro- 

 scopical Society of the City of New York, held Tuesday evening, 

 January 25, 1876, the following oflicers were elected for the ensuing- 

 year : — President, John B. Rich, M.D. ; Vice-President, Wm. H. 

 Atkinson, M.D. ; Secretary, C. F. Cox ; Treasurer, T. d'Orcmieulx ; 

 Curator, 0. G. Mason. 



An American Adjustable Concentric Stage for the Microscope. 

 — We have received a letter from Mr. W. H. Bullock, a microscope- 

 maker of Chicag(j, U.S.A., in which he asserts that " the exhibition of 

 Mr. Crouch of the microscope with adjustable concentric stage, at the 



