Category: History - Modern (1750+)
The Twentieth Century is the century of successful accomplishment. The zenith of human achievements appears to have been reached. Yet every day brings its new surprises. There seems to be no limit to the output of human genius and ingenuity. We have now the aeroplane skimming...
“Mention has been made in a preceding article of the effect of unequal expansion upon two different metals that have been bolted together. It is by this principle that the actio...
3. Part 3As illustrated in Figs. 4, 5, 6 and 7, the power applied by the springs M^{9}, M^{10} to the power transmission shaft M¹ is taken, through the spur wheel M² by means of any suit...
1. Part 1The Twentieth Century is the century of successful accomplishment. The zenith of human achievements appears to have been reached. Yet every day brings its new surprises. There s...
4. Part 4More than a hundred million dollars is the yearly loss by fire in the United States; 50 per cent. of this loss is by water. How important therefore is Bangerter’s “Watch Dog Fir...