ILLUSTRATIONS. 



Plate I. Babcock & Wilcox boilers used in making the tests (cf. p. 304). 



II. Voltmeter and ammeter diagrams of tests numbered 1, 2 and 3, Table II 

 (p. 311). 



III. Voltmeter and ammeter diagrams of tests numbered 4, 5 and 6, Table II 



(p. 311). 



IV. Voltmeter and ammeter diagrams of tests numbered 7, 8 and 9, Table II 



(p. 311). 

 V. Voltmeter and ammeter diagrams of tests numbered 10, 11 and 12, 



Table II (p. 311). 

 VI. Voltmeter and ammeter diagrams of tests numbered 13, 14 and 15, 



Table II (p. 311). 

 VII. Voltmeter and ammeter diagrams of tests numbered 16, 17 and 18, 

 Table II (p. 311). 

 VIII. Charts used in judging the color of the smoke (ef. p. 310). 

 IX. Grating of the charts in Plate VIII drawn to the exact scale. 

 X. Figure showing graphically the steam-pressure gauge readings of tests 

 numbered 1 to 10, recorded in Table IV, A to J, inclusive. The dotted 

 curves are supplemented from avitomatic indicator diagrams in order 

 to show the maximum and minimum variations. 

 XI. Figure showing graphically the steam-pressure gauge readings of tests 

 numbered 11 to 18, recorded in Table IV, K to R, inclusive. The 

 dotted curves are supplemented from automatic indicator diagrams in 

 order to show the maximum and minimum variations. 

 XII. Figure showing graphically the temperature of the flue gases, base of 

 stack, of tests numbered 1 to 10, I'ecorded in Table IV, A to J, in- 

 clusive. 

 XIII. Figure showing graphically the temperature of the flue gases, base of 

 stack, of tests numbered 11 to 18, recorded in Table IV. K to E, in- 

 elusive. Page. 

 Fig. 1. (In text.) Showing the flue-gas sampler used in drawing the gases 



for analysis 308 



2. (In text.) An ideal section shovping an ordinary type of boiler with 



an elongated fire box and additional baffle wall 344 



355 



