HOLLY'S IMPROVED WATER WORKS.

Direct Pumping Plan. Advantages: 1. Secures by

variable pressure a more reliable water supply for all

purposes. 2. Less cost for construction. 3. Less cost

for maintenance. 4. Less cost for daily supply for all

use of Holly's Improved Pumping Machinery. 5. Affords

the best fire protection in the world. 6. Largely

reduces insurance risks and premiums. 7. Dispenses

with fire engines, in whole or in part. 8. Reduces fire

department expenses. For information, address the

HOLLY MANUFACTURING CO., Lockport, N. Y.,

Or PARK BENJAMIN & BRO., Gen. Agents,

Scientific American, Vol. XLIII.—No. 1. [New Series.], July 3, 1880 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures · 第 131 / 157 题