OF THE SECRETIONS IN GENERAL. 287 



desis, or transudation ; which is the case with the fat 

 and the bony fluid.* 



470. Secretion by glandsf is more complicated. Such 

 is considered the secretion even by follicles and cryptae, 

 which are found, v. c. in some parts of the corium, the 

 fauces, and aspera arteria, and denominated the most 

 simple glands. 



Properly speaking, the conglomerate (as they are 

 called to distinguish them from the lymphatic conglo- 

 bate) are the only true secreting organs ; such as the 

 salivary and lachrymal glands, the pancreas and 

 breasts. They are provided with an excretory duct 

 coming immediately from the large lobes, which are 

 composed of others, smaller, and so intricate in their 

 structure as to have been the source of warm disputes 

 in the schools of medicine. Malpighi % considered the 

 ai ! , i 



* Physiologists liave given different explanations of this mode of secretion. 

 Some assert that every fluid is formed by passing merely through inorganic 

 pores from the blood : others altogether deny the existence of these pores. I 

 think much of this is a verbal dhpute. Because, on the one hand, I cannot 

 imagine how inorganic pores can be supposed to exist in an organised body, 

 for we are not speaking of the common interstices of matter, in physics deno- 

 minated pores ; and I am persuaded that every opening in organised bodies is 

 of an organic nature and possesses vital powers exactly correspondent. On 

 the other hand, these openings or pores, which indisputably exist in the coats 

 of vessels, I think but little different in function at least from the cylindrical 

 ducts through which fluids are said to percolate in conglomerate glands and 

 secreting viscera : for this percolation depends less on the form of the organ 

 than on its vital powers. (B) 



Consult, among others, Schreger, Fragmenta. p. 37 ; already recommended. 



P. Lupi, Nova per poros inorganicos secretionum theoria re/ntata, Sec. 

 Romae. 1793. ii. Vol. 8vo. 



Kreysig, Specimen secundum ; formerly mentioned. 



f Sam. Hendy, On Glandular Secretion. Lond. 1775. 8vo. 



X In works repeatedly quoted, and also in his Diss, de glandulis conglobatis. 



Lond. Ki89. 4to. 



But 



