Rope manufacture in ancient depictions and leather belting use
The article discusses tomb depictions of rope making and compares manila rope to leather belts for power transmission. It notes manila rope wears internally as fibers crush and break inside sheaves, while leather belts wear is external. It cites leather’s allowable stress around 320 psi and manila rope strength loss about 5 percent per year, yielding about 288 psi safe working stress.
MENTIONED IN THIS ARTICLE
Ional
Water filter plants need competent operators for public health
Dr. Allan J. McLaughlin of the U S public health service warns that water purification and sewage plants fail when operated by politically appointed non experts. He advocates sanitary engineering graduates who can adjust chemicals and perform daily bacteriological checks to prevent disasters. Chromic iron ore deposits noted in Maryland Pennsylvania North Carolina Wyoming and California could meet demand if ore value and demand justify mining.
MENTIONED IN THIS ARTICLE
Allan J. McLaughlin
United States Public Health Service
Maryland
Pennsylvania
North Carolina
Wyoming
United States
California
United States, Geological Survey
Rocky Mountains
Motor Overhauling and Common Causes of Engine Trouble
Article discusses periodic overhauling for gasoline engines and notes worn piston rings as a frequent yet often overlooked cause of compression loss. It explains how this leads to reduced efficiency and power and mentions resulting warm base chamber and carbonization from lubricant buildup.
Deficiencies Noted in House Plan Report
A brief record notes alleged deficiencies in an unspecified house plan under scrutiny. The fragment mentions WA and PA locations and a third-party review, but lacks full details or outcomes.
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