The concrete control methods described in this paper, although not new in principle, originated in their particular form during the construction for the Sunderland and South Shields Water Company of a small reinforced concrete reservoir, and were later
used on the construction for the same Company of barrel vault roofs to cover two existing service reservoirs. The paper therefore deals with concrete control as carried out' in these instances, with the implication that such methods may be directly applicable to other similar works. The title of the paper refers to "small works" but as the adjective is,of course, only relative, it may help to fix them on the scale of magnitude if, it is stated that the two structures respectively cost £45,000 and £20,000, and involved the placing of 1,600 cu. yd. and 600 cu. yd. of concrete. In each case the concrete was mixed in a 14/10 mixer.