William A. Radford · Radford Architectural Company · leaf 24
ght seem necessary fora 1 to 4 or a 1 to 5 block, and it is obviouslyunsafe to attempt to use a block of lean posed upon blocks for minor and lessimportant uses. Marking. All cement blocks should bestamped (in process of making), showingname of manufacturer, date (day, monthand year) made, and… … *• Pi^AiM PF CEMENT PpRCH — proportions in as short a time as a richmixture would gain the necessary strength. This might be supposed to be met by fix-ing the minimum resistance to crushing ofblocks (of all compositions); but it mustbe kept in mind that a very small percent-age of the blocks used…
