rid PHILOSOPHICAL TRANSACTIONS-. [aNNO 1745. 



Verj' hot, will nin into every the smallest cranii)-, and make the ship as tight as 

 a bottle. By this the ship is ballasted ; there will be no room left for vermin, as 

 rats, &c. and the pitch will serve for other uses when taken out ; therefore it 

 will be but little expence. 



On Osteocolla. By Ambrose Beurer of Norimberg. N° 476, p. 373. 



The author of this communication endeavours to prove, that osteocolla is the 

 petrified root of the black poplar tree (populus nigra). This paper concludes 

 with some attempts towards a chemical analysis of this petrifaction ; but these 

 imperfect trials it is unnecessary to reprint, after the very complete and satisfac- 

 tory experiments of Margraaf, inserted in the Memoires de I'Acad. de Berlin for 

 the year 1748. 



Concerning the Boy with an Extraordinary Boulimia, or Craving Appetite. By 

 J. Coohson, M.D. Dated April 24th, 1745. N" 476, p. 380. 



The following relation respecting the boy at Barnsley, 6 miles from Wake- 

 field, contains an account of his eating and drinking for 6 days successively. 



Matthew Daking, a healthy and sprightly boy, about 10 years old, was about 

 15 months since seized with a fever, which continued above a fortnight. In the 

 beginning he had frequent provocations to vomit, which induced his apothecary 

 to give a gentle vomit of ipecacuanha. The retchings continuing, he gave him 

 another : they seemed to operate well, but yet did not answer the end in settling 

 his stomach : however, the fever gradually went off, but the vomiting rather in- 

 creased, notwithstanding some other methods were used. 



He then began to have a craving appetite ; to satisfy which he was indulged 

 in eating and drinking more plentifully, but always vomited most of what he had 

 taken, almost immediately. His appetite kept increasing, so that in a few weeks 

 his eating was come to the pitch before mentioned. Thus he has continued 

 above a year. His urine and stools did not exceed those in health ; so that he 

 vomited most of what he took in. 



He had tried crude mercury, and all sorts of medicines, and mineral waters. 

 He looked pretty well in the face, and was cheerful ; but had lost the use of his 

 legs and thighs, which were much emaciated. He was sometimes so hungry, 

 that he said he could eat them all: he often wished he were in the king's kitchen. 



Medico-physical Observations on Ipecacuanha. By Fred. Gmelin, Med. Licent. 

 Wurtemb. From the Latin. N° 476, p. 382. 



Dr. G. had several microscopes, both simple and compound. The latter was 

 Mr. Martin's portable reflecting one. He exposed to the focus of this instru- 

 ment a very smallj pure, thin bit of the bark of this root, very carefully scraped 



