The Architect & engineer of California and the Pacific Coast (1905)
San Francisco, Calif. : Architect and Engineer Co · leaf 234
contrary live upon sulphuretted hydrogen and convert it to metallicsulphur. Another group of bacteria which might be spoken of are thesulphate-reducing bacteria which are capable of producing sulphurettedhydrogen by the reduction of mineral sulphates. The latter seems to be afactor of importance in… … Fig. I—A indicali . with finger nails. easilypunched through pipe with tin- tin^i-r. This ti-inch concrete pipewas running half fuli . pipe Upper half of pipi ard indicates thai pipele under proper sped- ■ I ma- The uninformed friends of concrete pipe claim thai there are no acidsin domestic…
Architecture · Building
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