82 



GENERAL ANALYSIS. 



TORY ORGANS SEEM INADEQUATE, are because the results 

 of motion are so numerous, and likewise so diverse, that 

 at first glance it does not seem reasonable that they 

 should have a similar cause ; but motion is the simple 

 idea in all the cases, and the direction or mode in which 

 it will be exhibited will depend upon, 



264. THE DIFFERENCE IN SIZE, FORM, AND POSITION 

 of similar apparatus, which will account for all the re- 

 sults of nervous motions observable in the body. 



265. Size. SUPPOSE a minute oblong cylindrical 

 cell, shaped like a bead, to have the power of alternately 

 contracting, or shortening, and relaxing when nervous 

 influence is sent into it. This will be the element of all 

 nervous motion, and a sufficient number of cells properly 

 arranged will produce all the results desirable. 



FIG. 78. Fig. 78, a plan of 



Muscle-Cells. 7, 8, 

 cells, end to end; 1, 

 cells end to end and 

 side by side ; 6, same, 

 spread; 2, 3, 4, bun- 

 dle of cells, separable 

 into discs, of which 

 5 is one. The form 

 of the bundles is very 

 irregular in the mus- 

 cles. The size here 

 is very much magni- 

 fied. 



266. IF CELLS BE CONNECTED, END TO END, they will 



increase the extent of motion. 



267. Inf. IF ONE CELL CAN SHORTEN only to the 

 extent of one hundredth the thickness of a hair, a hun- 

 dred cells would produce motion to the extent of a hair's 

 breadth, and a million of cells would produce a very 

 appreciable motion. 



268. IF THE CELLS BE CONNECTED, SIDE BY SIDE, 



will increase the strength of motion. 



269. Inf. IF ONE CELL COULD NOT BEND A HAIR, 



264. For what will account ? 265. What are you to ? Describe Fig. 78. 

 266. What if ? 27. What is said ? 268. What is said ? 269. What ? 



