424 THE SOLIDS. 



tendency to the triangular ; and the colour, although dif- 

 fering in different glands, depends upon their size and age, 

 the younger and smaller being transparent and almost free 

 from colour, the older and larger being of a deep orange or 

 ochre tint. (Plate LVII. Jj#. 3.) 



The prostatic calculi have been noticed by several ob- 

 servers; by Cruveilhier, Dr. Jones, Mr. Quekett, Mr. Adams, 

 of the London Hospital, Dr. Letheby, and myself. 



Dr. Jones* describes them as originating in oval or rounded 

 nucleated and organic vesicles, which enlarge and then have 

 their amorphous contents arranged into concentric laminae. 

 Dr. Letheby believes that " they are concretions which arise 

 exactly like those of the kidney and bladder, viz., by a suc- 

 cession of external deposits ; " this view is most probably the 

 correct one. 



Dr. Letheby has favoured me with the following observa- 

 tions on the chemistry of these bodies : " You will find," he 

 says f, " that they consist of phosphate of lime, which is 

 mixed up with a large quantity of nucleated fat cells and 

 inspissated mucus ; the whole being generally tinted with 

 some shade of yellow or red." 



" They are slowly soluble in strong acetic and muriatic 

 acids ; more quickly when heated, and they then leave nu- 

 merous fat globules and remnants of cells. They are not dis- 

 solved by potash or strong ammonia. Heated before the 

 blow-pipe, they char and leave a small residue of earthy 

 matter." 



The smaller calculi resemble closely the concentric corpus- 

 cles or bodies described by Mr. Gulliver as occurring in fibrin- 

 ous clots, and many of them do not present concentric lamella;. 



TUBULAR GLANDS. 



SUDOBIFEROUS GLANDS. 



The sudoriferous are the most numerous class of glands 

 in the body, their apertures thickly studding the entire ex- 



* Medical Gazette, 1847. t In litfc - 



