078 PHItOSOPHlCAI, TKANSACTIONS. [aNNO I694. 



make both ends two fixed north poles, or two fixed south poles. The shortest 

 length (for there is no terminus of the greatest length) for this is more in 

 thick than in thin iron. 



15. The aforesaid lengths are less, according to the strength of magnetism, 

 viz. ignition requires a greater length than when a rod is actuated by a load- 

 stone ; and a rod touched with a strong loadstone requires less length than one 

 touched with a weak one. 



j^n jiccount of a Lamb suckled by a TVether Sheep for several Months after the 

 Death of the Ewe. Communicated by Mr. Tho. Kirhe, from Cookridge in 

 Yorkshire. N° 214, p. 263. 



The other day I dined with a neighbouring gentleman. Sir Wm. Lowther, 

 where I met with something that seemed remarkable: he had this year a ewe 

 that had two lambs, and she dying, left them young to shift for themselves ; 

 one of them was entertained by a wether sheep (aries castratus) among above 

 a hundred other sheep : the lamb sucked the wether, and brought him to milk, 

 and was maintained by him all this summer, till about a month ago that he was 

 weaned. The wether was brought up to us, and we saw his udder, each side 

 of which was about the size of a hen's egg, and he had two considerable teats. 

 I saw milk spurted out of them, to a yard or two's distance, notwithstanding 

 the lamb had been taken from him so long, &c. Sept. 28, i6q4. 



Yesterday I saw the wether again, his udder is much fallen, each side being 

 now about the size of a walnut; there is milk still in it, enough to stream 

 out above half a yard. There are no tokens at all of an hermaphrodite in him. 

 I compared him with another wether who had teats or paps like him, and dif- 

 fered in nothing but the udder. The lamb it seems was about five weeks old, 

 so it is likely might feed partly on grass, as I suppose other lambs of the like 

 age do, notwithstanding what they suck from their dams, &c. Nov. 2, i6Q4. 



An Account of Books, viz. 1 . Reflections upon ancient and modem Learning. 

 By W. JVotlon, B. D. R, S. S. and Chaplain to the Right Hon. the Earl of 

 Nottingham. London, 8vo. i6q4. N°2I4, p. 204. 



The design of this book, as the author says himself in his preface, is to state ^ 

 the boundaries of ancient and modern learning, that so men may know which 

 to recur to as their guides, if they would be masters of any particular part of 

 knowledge ; it being in his opinion a very pernicious thing, and very destruc- 

 tive to the increase of solid learning, to rest upon the ancients where the 

 moderns have succeeded them : or to study second-hand books upon subjects 



