Bulletin Volume 88

Bulletin Volume 88

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 edition. Excerpt: ...at their present rate of interest. Kings River Quarry and crusher plant of the Pledra Rock and 'Sand Company at Pledra, Fresno County. Capacity 1200 tons per day. In 1919, as has been the case for a number of years past, Los Angeles County le_d all others by a wide margin, with an output valued at $715,524; followed by Alameda, second, with $309,572; Sacramento, third, $276,432; Contra Costa, fourth, $275,309; and Fresno, fifth, $241,213. Paving Blocks. The paving block industry has decreased materially of recent years, almost to the vanishing point, because of the increased construction of smoother pavements demanded by motor-vehicle traffic. The blocks made in Solano County were of basalt; those from Sonoma are of basalt, andesite, and some trachyte, while those from Placer, Riverside, San Bernardino, and San Diego are of granite. Production in 1919 amounted to only 27 M., valued at $1,350, from a single producer, each, in Riverside, San Diego and Sonoma counties: The amount and value of paving block production annually since 1887 has been as follows: 'Figures for 1887-1892 (inc.) are for Sonoma County only, as nona are available for other counties during that period; though Solano County quarries were then also quite active. Grinding Mill Pebbles., _ 1 _"_;;.-;, _; I ' Production of pebbles for tube and grindingfmtills began commercially in California in 1915. Owing to therdecre-a_s_ed imports and higher prices of Belgium and other European; flint pebbles, there has been a serious inquiry for domestic sources of supply. One of the shipments made in that year was of pebbles selected from gold-dredger tailings in Sacramento County, for use in a gold mill in Amador County employing Hardinge mills. The important...show more

Product details

  • Paperback | 66 pages
  • 189 x 246 x 4mm | 136g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236816951
  • 9781236816955