S8G Mr Deucliar on the Nature of Flame. 
a cap which nearly fits A ; it is placed at the end of a bar 
of brass CD, and moves upon a joint at D. I is a piece 
of cork, to prevent C coming too close upon A, but by its 
elasticity, to allow it to come close when the blow is given on 
the top of C. GH is a thick plate of copper to attach CD 
to the tube AB ; and EF is a frame of wood to prevent GH 
being bent or injured by the discharging the apparatus. 
KLMN is the canister alluded to in Exp. 3. it is placed in 
the manner described. OPA is the bent tube used in 
Exp. 4. 
Fig. 2. a section of the cap C, and the steel hammer e, which 
strikes upon the powder at the top of the tube AB. 
Fig. 3. a section of the top A f, and the cup d, for holding the 
fulminating powder. The bottom piece d f screws out of A, 
for the purpose of getting it cleaned. The hole of the tube 
is at a separated into three small holes, to prevent the pow- 
der falling through. 
Fig. 4. the face of the top of A, and the bottom of the cup d, 
on which is seen the size of the three small holes through 
which the flame is forced during a discliarge. 
Fig. 5. the end of one of the divisions of the tube AB, and the 
size of the male screws which unite them at a, b and c. Into 
the female screws at a, b and c, were put tlie gunpowder 
used in Exp. 18. and the wire gauze in Exp. 13, 14, 15, 
16, and 17. 
Fig. 6. the bore of the tube AB, and the bottom of the male 
screw^s at a, b, c, and the bottom of the tube B. 
Fig. 7. The new apparatus freed from the tube, as fitted to and 
used in discharging the six-pounder. It is screwed to the 
gun by three nailsx C is turned to the muzzle, and D to 
the breach of the gun. See page 376. 
Fig. 8. The corresponding part to A f. Fig. 1., of the apparatus 
affixed to the six pounder alluded to at page 376. Tfiis 
screws out when the gun is to be cleaned. 
Fig. 9. is the bottom of Fig. 8. 
Figs. 4. 5, 6, and 9, are of the full size ; Fig. 7- is 6 inches 
long. Fig. 8. is inches deep. The size of Figs. % and 
3., which are fitted to each other, will be seen from Fig. 4., 
w Inch is the face of Fig. 3. 
