Sir Phil. Skippon to Mr. Wray, 29 



common Vibration that Hugenius invented in Watches, 

 and Mr. Hooke hath to that added a Circular Motion - y 

 the weight at the end of one Vibration is turned off 

 by a kind of a Spring, which makes the Motion cir- 

 cular. The molt considerable Experiment Yefterday, 

 was the weighing of i ft Tin, z d Copper, 3 d Tin and 

 Copper equally mixt together: Thefe three feverally 

 were of the fame weight in the Air, but in Water 

 the mixt Metal weighed much lighter than the other 

 two. A new Book of Dr. H. Moor is come out 5 

 which he calls Enchiridion Ethicum. 



Feb. 21, 1667. 



Mr. Wray to Mr. Lifter, at Burwell /;/ 



Lincolnfhire. 



Jo. Wray D. Martino Lifter fuo S. D. 



SEntentiam tuam de autoribus iis qui de Infectis 

 commentati funt, in plerifque probo. Ariftoteles, 

 quamvis egregius autor, confufus efTe vidctur aliquando 

 & obfcurus, & in quamplurimis a fcopo aberrat. Qui 

 tamen fuperfunt hiftoriae animalium libri non funt in- 

 tegrum Ariftotelis de hac materia opus. Cum Plinius 

 (ni male memini) quinquaginta voluminum meminir. 

 De Aldrovando, Alberto, Cardano, juxta tecum fentio. 

 In Wottoni opere non admodum verfatus fum ; video 

 tamen ilium ex antiquorum fcriptis haufifle quicquid 

 fere in illud volumen contulerit. In Mouffetum ni- 

 mis iniquus videris: nam & ille, me judice, non male 

 meruit de repub. literaria, & pleriqs viri do&i mihi 

 fuffragantur. Goedartium mihi nondum videre con- 

 tigit. Kircheri judicium nihili facio> an verb In- 

 fe<5ta quasdam fponte oriantur necne, determinare ne- 

 queo. Prseter hos qui de infe£lis fcripferunt, alicujus 

 fiominis aut pretii nullos novi : vidi aliquando in Sici- 



lia 



