on the Colouring MatUr of Cochineal. 319 



gave a dark red ponceau ; which, however, poffefled great 

 brisrhtnefs. 



Exf>. XVII. A'pieoe of kerfeymere was dipped for three 

 minutes in a folution of muriate of ftrontian, and then im- 

 merfed in a bath of cochineal. It affumed a dark colour; 

 which at firll imitated that of fcarlet, but which by drying 

 palled to crimfon. 



Exp. XVI [I. A neutral folution of nitrate of ftrontian 

 produced a bright reddifli brown. 



£xp. XiX. Acetite of ftrontian produced a bright pon- 



The refults of thefe experiments prove, not only that the 

 metals and earihs fubjedled to trial poftefs a certain chemical 

 affinity for the colouring matter of cochineal, and are capable 

 of fixing it on ftulfk, but that they pofTefs alfo the property 

 of producing with the fame pigment very diflcrent fiiades. 

 They prove Ijcfides, that the nature of the acid, which ferves 

 as a folvent to thefe fubftances, exercifes a great influence 

 on tlie ftiades produced. 



'i"hc refults obtained with the oxide ofarfenic and the acid 

 of that metal, are no lefs worthy of attention. The difference 

 of the colours produced is particularly remarkable. The oxy- 

 gen, no doubt, had the greateft ftiare in this phaenomenon, 

 as this principle manifefts, in a very evident manner, its 

 great influence in the produ(Siion of fcarlet by the muriate of 

 tin oxidated by the air. 



LI I. On the Manner of Hunting nnd Sporting by the Engl/Jh 

 in Bengal. Communicated by Colonel G. Ironside*. 



r E\V parties of plcafure can be more agreeable than thofe 

 for hunting, formed by ladies and gentlemen in iiengal. par- 

 ticularly at fonie diftance from the prefulency of Fort Wil- 

 liam, where tiie country is pleafantci-, and game of every 

 kind in greater plenty. Any lime between the beginning ot 

 November and end of February is taken for tlielc excur- 

 fions; durinir which feaf<m the climate is delightfully tem- 

 perate, the air perfeAly fcrene, and the fky often without a 

 cloud. 



To tranfport the tents and other requifites, for the accom- 



• f lom lUc A/icUic Annual Rfgijier f<j> iSoj. 



6 mod«Uoa 



