128 



TISSUES IN GENERAL. 



moment of death." I am unable to see in the living, striated 

 muscle anything else than in the living protoplasma in general 

 namely, granules and heaps of granules of living matter, the 

 sarcous elements, and between these a non-contractile interstitial 

 substance. 



Whatever form the distribution of the contractile substance 

 may give rise to, we can prove that every granule and every 

 sarcous element is in all directions connected with its neighbors 

 by means of delicate gray filaments piercing the interstitial sub- 

 stance in vertical and transverse directions. From each so-called 



" muscle-nucleus," and in case 

 the nucleus is surrounded 

 by protoplasm, from the lat- 

 ter, emanate delicate conical 

 threads, which, after having 

 penetrated the narrow light 

 rim, blend with the neigh- 

 boring sarcous elements. 

 (See Fig. 41.) 



In gold- stained specimens 

 these features are far more 

 striking than in fresh muscle, 

 as the chloride of gold, acting 

 for a sufficient length of time, 

 viz., twenty to forty min- 

 utes, stains the contractile 

 FIG. 41. PORTION OF THE FRESH THIGH- substance of muscle violet, 

 MUSCLE OF HYDROPHILUS PICEUS. Structure-elements of tlic 

 [PUBLISHED IN 1873.] Nervous System. Thin sec- 



tions from the cortex or the 

 main ganglia of a grown, re- 

 cently killed rabbit are the best specimens for examination with 

 high powers of the microscope. The section may be transferred 

 to the slide without or with the addition of a preserving fluid ; 

 in the latter case, a very dilute solution of bichromate of potash 

 is preferable, because, as proved by A. Rollett, this does not alter 

 the structure of protoplasm. Layers of protoplasm, with numer- 

 ous formations like nuclei, ganglion-corpuscles of varying shape, 

 and non-medullated* nerve-fibers of different size are seen. The 

 living matter in the formations termed nucleoli, being compactly 

 accumulated, is homogeneous, and has a yellowish luster ; while 

 * The original reads by mistake " medullated." 



N, nucleus ; G, granules in the longitudinal direc- 

 tion of the nucleus. Magnified 800 diameters. 



