A. James Watt
B. Faraday
C. Besse!
D. All of these

A. Iron
B. Sillcon
C. Carbon
D. Aluminum

A. 42 Gallons
B. 156 Liters
C. 186 Liters
D. 158.9 Liters

A. Oxygen
B. Hydrogen
C. Nitrogen
D. Helium

A. Nitrogen
B. Methane
C. Carbon dioxide
D. Hydrogen

A. An acidic oxide
B. A basic oxide
C. A neutral oxide
D. An atmospheric oxide

A. Alumina
B. Calcium oxide
C. Gypsum
D. Silica

A. Bronze
B. Aluminium bronze
C. German silver
D. Phosphorus bronze

A. Brass
B. Bronze
C. Gunmetal
D. German silver

A. Phytometer
B. Cytometer
C. Potometer
D. Crescograph