260 DR. BEALE_, ON THE TISSUES. 



coloured^ and in many cases the central part of the germinal 

 matter is occupied by numerous small starch-grains. The 

 matter deposited amongst the particles, or in the central part 

 of the germinal matter. Dr. Beale proposed to call secondary 

 deposits. The germinal matter will always be found between 

 these and the so-called cell-wall. It is possible that these 

 substances are precipitated in consequence of certain changes 

 having occurred in the formed material in the interior, of a 

 diflEereut nature to those which led to the formation of the 

 envelope or cell-wall on the external part of the mass. In 

 many cases the secondary deposits accumulate as long as any 

 germinal matter remains in a living state. 



We may, then, conclude that the elementary parts of all 

 tissues, vegetable as well as animal, are composed of matter 

 in two states, germinal matter and formed material, and that 

 all growth takes place through the intervention of the ger- 

 minal matter alone, which possesses the power of gi'owing 

 infinitely. 



It appears that in certain cases, both in animals and in 

 vegetables, the formed material, or insoluble substances result- 

 ing from certain changes eflFected in it, may be deposited 

 upon the external surface of the germinal matter, or it may 

 accumulate amongst the particles of the germinal matter 

 itself. The deposit in the latter case would take place, first 

 of all, in the fiuid which intervenes between the spherical 

 particles of germinal matter, and this process, having once 

 commenced, might proceed until a very considerable accumu- 

 lation had taken place. 



In many structures the substance Avhich is precipitated 

 amongst the living particles in an insoluble form is pre- 

 vented from escaping through the outer layer of formed 

 material or membranous capsule (cell-wall) within which 

 the germinal matter (primordial utricle) and the substances 

 which have been termed secondary deposits (a paii; of the 

 so-called cell-contents) are found. The escape of these sub- 

 stances, which are precipitated in an insoluble form, can 

 never take place without the destruction of the whole mass, 

 or the formation of an opening. If the products so formed 

 were fluid they would coalesce, and at length a mass of con- 

 siderable size might be pi^oduced, and the actively growing, 

 or germinal, matter would form a layer between the insoluble 

 substance and the inner surface of the wall of the capsule, 

 the position which the primordial utricle occupies in the 

 vegetable cell, and the germinal matter (here called the 

 nucleus), in the fat-vesicle. When these changes commence 

 in the fat-cells, a little oil-globule is sometimes seen in the 



