110 26 
1,900-1b. Charge of 50/50 Amatol ; Gauges 46} feet away. (See Fig. 14.) 
Shot. Gauge. GX 2. | GY 2. | GZ2. | GA2. GBl. 
oa L BH 15 1g 3 83 
88 A 68°8 99-5 128-6 147-4 106-6 
90 A 69°7 100-1 133-7 150-2 107-3 
Average 4 69°2 99-8 131°1 146°8 106-9 
_ v 86°3 158-3 244°6 875-2 450°8 
= t 22 425 “85 2-05 3-18 
1,900-lb. Charge of 50/50 Amatol ; Gauges 924 feet away. (See Fig. 15.) 
Shot. | Gauge. GX 4. | GY 3. | G Z3. GA3. | GA4. | GB2. 
ae L j 1n 2h 4} o) “NW cae 
88 A 23°4 37-5 51:4 55°5 80:0 | 51°7 
90 A 23-0 38°7 52-6 54°5 CUT 51:7 
Average A 23-2 38°] 52-0 55°0 78°8 51°7 
= v 86:1 75°3 124-4 185-8 222-0 251°9 
_— t 195 445 #9 2°03 3°28 5°15 
SSS ||| SSeS | SS 
*70 *495 °24 13 | *O7 
1,900-1b. Charge of 50/50 Amatol ; Gauges 185 feet away. (See Fig. 16.) 
Shot. | Gauge. Gxe. GY6. GZé6 ' GAS. | GA6. 
= L H Iss lf 4} 3 
88 A 20:8 29-5 38°5 29-8 37-4 
90 A 20-9 28-1 36-5 27-4 36-9 
Average A 20°8 28-8 37°5 28°6 37-1 
= v 36-2 60-5 89-6 108-8 120-1 
= t “52 1-04 2-18 3-37 5°59 
1 SSS Ss, Se 
— | Pp | +31 “21 +113 -072 +023 
(19) Gauges for measuring the Maximum Pressure. 
It is necessary to supplement the gauges described in the last section by others 
capable of measuring the maximum intensity of the pressure. What is wanted for this 
purpose is a gauge that will operate in the smallest possible time. If the gauye is to be 
of the same general type as those already described, that is to say, with a steel piston 
acting on a copper crusher, the obvious line of development is to reduce as much as 
