MEMOIR OF JOHN HUNTER. 59 



of six lectures, which were delivered in as many 

 years. In these lectures he collected his numerous 

 observations on Muscles treated of their powers, 

 and the effects of the stimuli by which they are af- 

 fected and illustrated these points by comparative 

 observations upon the moving powers of plants. 



The efforts of the Humane Society having drawn 

 much public attention about this time, in conse- 

 quence of the exertions of Dr Cogan and Dr Hawes, 

 and the institution having at length been recognised 

 as a royal establishment, Mr Hunter's abilities were 

 put in requisition by his friends, and he accordingly 

 read a long and interesting paper on the subject in 

 the Royal Society, entitled, " Proposals for the re- 

 covery of persons apparently drowned." 



In J 777, he read a second paper on the heat of 

 animals and vegetables ; and at this time published 

 the second part of his treatise on the Teeth. In 

 1779, he gave a description of the Free-Martin in 

 the Philosophical Transactions ; and in rapid suc- 

 cession, an account of an extraordinary Pheasant 

 of the Organ of Hearing in Fishes on a new Ma- 

 rine Animal observations on the Wolf, Jackall, 

 and Dog on the Structure and Economy of Whales 

 and, finally, as late as 1792, Observations on Bees. 

 Besides these, other papers appeared in his work on 

 the Animal Economy, published in 1786. Several 

 were on natural history. Such, for example, was 

 his paper on the Secretion in the Crop of Breeding 

 Pigeons for the nourishment of their young on 



