480 Mr. GuUivei-'s Contributions to the 



ranged cvlindrically on a stand and shut by machinery at in- 

 tervals of six hours, would, from the preceding investigation, 

 indicate the mean daily pressure at whatever time the instru- 

 ment were wound up. 



As the aerial tide rushing over a mountain-flanked valley 

 greatly resembles the aqueous tide rushing upwards over the 

 bed of a river, may not some local constant, similar to the 

 establishment of the port, be attached to the place of observa- 

 tion ? 

 London, March 14, 1842. S. M. D. 



LXXI. Co7itrihutions to the Minute Anatomy of Atiimals. By 

 George Gulliver, F.R.S., S)-c. Src* 



AS minute anatomy is now become more generally interest- 

 ing than formerly, and begins to assume the character of 

 an extensive and comparatively accurate science, so as to 

 give a new complexion to some of the most important questions 

 in physiology and pathology, and to enable us to submit many 

 old doctrines to a more exact scrutiny than most of our classical 

 anatomists had the means of employing, it appears to me that 

 considerable advantage might arise if different independent 

 observers would more frequently publish a brief yet clear ac- 

 count of the results of their inquiries. Hence I propose to 

 communicate occasionally to the Philosophical Magazine, a 

 series of short notes on the ultimate structure of various ani- 

 mal tissues and on the elementary forms which occur in the 

 fluids, taking the descriptions in all cases from my own ob- 

 servations, and frequently illustrating them with wood-cuts. 

 It will thus be attempted to give either a more precise ac- 

 count than we yet possess of some of the healthy and dis- 

 eased parts of man and the lower animals, to present certain 

 particulars of structure in novel physiological relations, or to 

 record facts which may appear to have escaped the attention 

 of previous observers : in short, to contribute summary and 

 plain notes concerning numerous detached anatomical points 

 which may perhaps be treated of as profitably in this man- 

 ner as by set dissertations. 



On the Lymph-Globules of Birds. 



It is well known that the blood of the vertebrate animals 

 contains, besides the numberless red discs, a few pale globules 

 which have very commonly been regarded as those of lymph. 

 In birds, however, the globules which constitute the greater 

 part of the juice of the lymphatic glands are generally rather 



* Communicated by the Author. 



