Show I BOOM IN MATERIAL TESTING Increase in Facilities Has Grown Rapidly R RapIdly Rap Rap- lp- lp Idly in Past Few Years in inDifferent inDifferent inDifferent Different States The great boom In highway building build build- ing lag which has hns come since the federal federal- aid act of 1916 has led to an un Increase In the facilities for testing highway materials The bureau of ot public roads of the United States Department of or Agriculture keeps In touch with all laboratories which test material for federal-aid federal roads and reports that the number has hns grown from a 0 scattered few rew In 1916 to at least one In every state with two exceptions They are distributed as follows State highway department laboratories 20 O university laboratories 27 21 and ond commercial laboratories laboratories laboratories labor labor- 21 1 a R total of 68 Conditions have e become such that It ItIs Itis itIs is practically a necessity for each state to have means of quick testing In order not to delay work In passing passing pass pass- ing materials the laboratories are governed by the idea that roads must be he constructed with materials close ut at hand wherever possible and give ghe as os- for the use of such material where It If is suitable |