Method offupplying Diving-hells with fnJJj Air. 9 

 We are not yet prepared, it is obvious, to give an exact 

 jrenealogical hiftory of the Indian dog. We are compelled 

 to mix conieaure with faft. The anatomical flrudlure ot 

 the animarihonld be examined. But, whatever may have 

 been the origin of this breed of dogs, I am difpofed to thuik, 

 with JofTelyn, that the favages found it in the woods, ana 

 that it has exifted as a diftina fpccies, ov breed, for a very 

 loner period of time. Several of the earlier vifitors of ditterent 

 parfs of North America fpeak of the exigence of wild dogs 

 in the country. Renatus Laudonenus invaded Florida m the 

 year i <64, only a few years after the death of Soto. In his 

 enumeration of the native produdions of the country he 

 mentions wild dogs. There is no reafon to luppoie that he 

 has confounded them with.the wolves: for he exprelsly iays 

 that the country produced, befide thefe dogs, feme Ipecies ot 



y/olves *. ^ ^ • u /--' ir 



The difcoverers of the ifland of Cape Breton, in the (jult 

 of St. Lawrence, found in that idand black dogs, which, we 

 are informed, the Indians were very careful to bring up to 

 hunting f. I think it probable that both thefe and the do^s 

 mentioned by Laudonerius were the fame as the halt-wolt 

 breed which I have defcribed. 



[To be continued.] 



II. An Account of a 7ieiv Method of fuppljing Dlving-hcUs 

 with frefh Air. By Robert Hka ly, A. b. 



To Mr. Tilloch. I^ublin, Jan. 8 1S03, 



^••■"> 4.3, James s-ureet. 



I TAKE the liberty of communicating an experiment on 

 diviner, which was made lall Augufl by my father, Mr. Sa- 

 muefHealy. Should it appear worthy of holding a place in 

 vour very ufeful and inftruftive Magazine, you are at full 

 liberty to infert it. Robekt Hhai.y. 



THE method of fupplving a diving-bell with a.r, which 

 has hitherto been generally adopted, renders ,t a mofi imprac- 

 ticable either to defcend in water to any confidcrabie depth, 

 or to remain there a length of time iufficient to perform any 

 thine ufeful. Much Inconvenience refulls from the attention 

 which it is neceflary to pay ni admitting the fupply from the 

 barrels, which are ufed as reicrvoirs ot air; much alio from 



» See De Laet's Novus Orhis, lib. iv. p. 215. 



f See the fdmt, lib. ii. I'. 37. , 



