366 Of 'Things relating to Mathematic\sj&c. Part IV. 
An ASSAY ER to try the ftrength of Gun-powder. Con- 
triv'd by his Highnefs Prince Rupert. Composed of two 
flat, upright and parallel Stands of Brafs, about a foot and 
I high, with a (hallow Indenture on both their inner edges. 
Upon the Bafe on which they ftand, and between them, is 
placed a Powder-Pan. Over which, a Slider, with a thin 
Plate-Spring, which plays againft the faid Teeth, and two 
Arms for the charging it with weight at pleafure. The 
ftronger the Powder is, it forceth the Slider to a greater 
height. 
A WIND GUN. Given by Dr. Wilkins late Bilhop of 
Cbefter. Compofed of two Barrels, one within another. 
To which is fitted a Rod to charge it with Air. At the 
Breech, where the two Barrels are open one into the other, 
is placed a Valve, to admit the Air into the outer Barrel, as 
the Rod drives it, and to keep it there. 
A Seven-SHOT GUN, or a Gun which carries Pow- 
der and Bullets, for feven Charges and Difcharges to be 
made prefently one after another. Given by Dudly Palmer 
Efq,. Under the Breech of the Barrel, is one Box for the 
Powder. A little before the Lock, another for the Bullets. 
Behind the Cock, a Charger: which carries the Powder 
from the Box to a Funnil at the further end of the Lock 5 
opens one Valve to let it into the Barrel, and the Priming- 
Pan 5 another, to let in the Bullet after it 3 raifes the Cock 5 
and lets down the Steel 3 all at one time. 
An Indian Poyfon d DAGGER. About '* a yard long. 
The Hilt is a fort of Wood, as firm as Box. Very curioufly 
carved into a kind of Antique Head. The Neck by which 
it joyns to the Blade, plated with Gold, and embos'd with a 
Ring in the middle, in which isfet fome fmallfparks of 
Gems. The Blade about 14 inches long, and an inch 
broad about the middle 3 waved in the manner of fome 
Swords hung up for Signs, and much expanded next the 
Hilt, the better to ftay the Hand : where it is alfo curioufly 
Damask'd with Gold. But every where elfe with white 
flourifla'd Work of the colour of Silver. Saving both the 
Edges, which are left naked , and are very fharp. But 
that which is moft obfervable is the Scabbard, which is one 
entire piece of Wood ( near the colour of the beft Walnut) 
with a Cavity cut down to the bottom of it anfwerable 
to the Blade. A 
