MOULDING, S\VAI5IJIN(] AM) I'nUKlNC TKST J5AKS.
bars, still not so high but the temperature of day in and. day out can be utilized and all delays allowed for, so as to maintain a close uniformity. By endeavoring to maintain about the same temperature when pouring, it would go a great way in enabling the tester to attach more value to any comparison he might wish to make with his past record, or with others.
The cut Fig. 129 is a plan for casting plain test bars on end, so simple that any foundryman can find flasks, etc., to instantly change from casting flat to that of casting on end, should he desire to do so.* IS, IS is the test bar mould. B, B are the "gates" connecting the pouring basin and the moulds. M, pouring well. P, cope. R, nowel. For further description, see pages 510 and 521.
I2</. KIO. 130.
* A few praetiee pouring burs on end without u cope, merely dropping the metal directly into the mould, but sueh u piuu is more apt to j^ive defective bur1'..sed. I would not advise a metal being too " hot " or too " dull," but something that would average about four and one-half inches up in the fluidity testing tips S and S, Figs. 121 and 122, pages 509 and 514.