lievieivs and Koikes lespectivg New Books. 129 



course of the electric fluid is impeded by 



are obstacles in its path by the interposition of) imperfect conductors ; 



of its passage, under such circumstances, 

 and such is the velocity ( with which it is transmitted, ) that the 



light is visible 

 (sparks appear to take place) at the very same instant along the 



This may be illustrated by pasting a row 

 whole line of its course. (Thus if a row of small fragments) of tin- 

 discs of a small size (fig. 18.) 

 foil (be pasted) on a piece of glass (fig. 19.)" 



[Here the figure is copied, and so are many of the others, only re- 

 versed, or slightly altered.] 



Library of Useful Knowledge. 



Leithead, p. 28. Now it must be remembered these cases 



" (§ 105) (It should be recollected) that in all (the changes we have 

 thus traced as the eflfects of induction, there has been) no transfer of 

 the electric fluid has taken place between 



(electricity) (from either of ) the bodies (to the other); 



which is the experiment in which 



(as was suflficiently) proved, (indeed,) by (their taking place equally 



the glass plate is 

 if ) (a plate of glass be) interposed. Another proof is afforded by the 

 circumstance that the mere removal of the bodies to a distance from 



each will its own 



(one an)other, (is sufficient to) restore each of them to (their) original 



in as positive a state 

 state. The globe remains (as positively electrified) as before ; the 



resumes state there 



cylinder (returns to) its (condition) of perfect neutrality ; (nothing) 



no loss, no gain 



has been (lost, ) (and nothing gained) on either side. The experi- 



over and over again, the phaenomena 



ment may be repeated (as often as we please,) (without any variation 

 will not vary. the eflfects would be difi'erent 



in the phaenomena). But (this would not be the case) if the cylinder 



was 

 (were) divided in the middle, and one or both of the parts were remo- 

 ved separately, while they still remained under the influence of the 

 globe." 



The above are at any rate very amusing specimens of the art of 

 ringing the changes upon words and sentences, sometimes at the ex- 

 pense of style and grammar ; but how insufficient for the purpose of 

 disguising wholesale piracy will be quite evident to any who may be 

 disposed to follow up the comparison from page to page throughout 

 the first part of the work, and to admire the gravity with which our 

 Secretary struts about in his borrowed feathers. With the ** accu- 

 racy of cautious research," he discovers the two above-mentioned 

 sixpenny Nnmbers in Paternoster llow, and with " the strength of 



Phil. Mag. S. 3. Vol. 12. No. 71. SuppL Jan. 1838. S 



