iss 



PHILOSOPHICAL TRANSACTIONS. 



[anno 1668. 



Among the many medical prescriptions set down here, the author gives us 

 the podagric unguent of the so much famed Franciscus Jos. Borrhi, made up of 

 almost all the parts of a stag : which how far it deserves commendations, must 

 be learned from experience.* 



The Variations of the Magnetic Needle predicted for many Years 

 following. By Mr. Henry Bond. N" 40, p. 789- 



The doctrine of the magnet and magnetical motions is yet so obscure, that 

 what hitherto has been discoursed and written upon that subject, proves very 

 unsatisfactory. An intelligent mathematician and teacher of navigation in Eng- 

 land, Mr. Henry Bond, having formed to himself an hypothesis of the variations 

 of the needle, has thence calculated the following table; showing how the 

 variations of the magnetic needle will fall out for many years to come ; which 

 variation he conceives is now westward, and to have been so for some few years 

 past ; whereas they were formerly eastward. This philosophical prediction is 

 here made public, that inquisitive men may every where from time to time 

 make observations accordingly, either to verify or to invalidate the proposed 

 theory. 



* It is now known that the volatile salt and spirit extracted from the horns of the stag are in no 

 respect different either as to chemical properties or medical virtues from the volatile salt and spirit 

 extracted from the bony parts of other animals. The stag, therefore, need no longer be regarded as 

 an animal furnishing peculiar materials for the use of the healing art. It would be no recommendation 

 in these days of the above-mentioned unguent, that it was " made up of almost all the parts of a 

 stag!" 



