232 MUCILAGINOUS MATTER. 



The fand ap- That the fand will yield a little, I think I may infer from 



little. having charged a lube of tin 14 inches in length and 1| diam- 



eter, with three inches of powder; on exploding it immcrfed 

 in water, I found /ire inches of the tube abruptly cut off, while 

 the remainder, was uninjured, but I do not confider this in- 

 ference as decifive. 



For want of time I was prevented from trying how much lefi 

 than three inches of fand would have been fufficient. 



I am. Sir, 



Your moft obedient, 



W. JESSOP. 

 London Coffee Houfe, 

 Nov. 8, 1804. 



A charge of P. S, Might not this be ufeful on the evacuation of a fort, 



fand would pro- in deftroying cannon, inflead of the ineffe£tual mode by fpik- 

 bably deilroy . ^ 

 ardUcry. »"g ? 



111. 



On the Mucilaginous Matter of certain Vegetables, and their life 

 as a Suhjiitute for Gum Arabic: by Mr. Thomas Willis ; 

 being a Continuation of Experiments made upon the Suhjedt by 

 him, in Addition to thofe for77ierlTt/ puhlijhed in the Tranfu6tions 

 of the Society of Arts.* 



Letter to CUkKLES TAYLOR, Efq. 

 SIR, 



MucHaglnous i HAVE taken the liberty of prefenting to the Society for 

 powders from the Encouragement of Arts, 8z,c. fpecimens of the powder of 

 vernal fquills, of white lily-roots, and of falop, for their con- 

 fideration and trial. I believe the bulbs of the vernal fquill 

 will be found to be equally ufeful as thofe of the hyacinthus 

 non-fcriptus; and the ftrong mucilage from the white lily-root 

 and the falop much more fo. 



As gum-arabic has been at times, during the laft war, above 

 30/. per cwt. the multiplication of diflerentfubflances that will 

 anfwer the fame purpofe, will afTuredly be an obje6l of a very 

 interefting nature to manufacturers in time of war. 



* Extraaed from their Tranfaaions, Vol. XXI. The former 

 experiments are in our Journal, VII, 30. 



I have 



