4i 6

MODERN STEAM PRACTICE.

while some consider the box form preferable; and all these forms aresuccessfully carried out in practice. Strength is the main thing to belooked to; but the open form of framing has the advantage of givingmore convenient access to the various glands. The frame is firmlybolted to the cylinder at the top and bottom, and also to a flangecarried along from the cylinder to the condenser. This flange is

Fig. 300.—Main Framing of + Section.

a, Frame, b, Brasses. c, Cap. d d, Bolts and nuts. e e, Flanges for bolting to cylinder.f, Flange for bolting to condenser.

secured to the keelson or engine bearers by long bolts passingdown to the under side of the bearers, with cross bars of cast ironat the under side; in this way the whole depth of the engine beareris secured. All the bolt holes should have proper bosses cast onthe framing, to suit the bottom and other flanges connected to thecylinder and condenser, so that a fair bed for the nuts can easilybe faced up. The brasses for the pillow blocks are fitted just as inany other arrangement lying on its side, and are secured by capsof cast or wrought iron; each cap has two large bolts passingthrough it into holes cast and bored out in the casting, and fastenedwith cotters. The cap is fitted with clips at the top and bottom, nicelyfitted to the pillow block, to prevent its sides springing; and thenuts for the bolts are fitted with washers and set pins, to preventthem becoming loose. All the work connected with the pillow