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September, 1925 can also be readily housed or taken inboard at any time. There is no danger of its getting caught in the propeller when stopping or going astern nor is it liable to damage by other vessels passing close under the stern. An additional advantage is that the connector can be set at any angle and may therefore be located either in way of, forward or aft of the bridge. Long Stroke Air Drill With Speed Governor A new long stroke pneumatic drill recently developed by Ingersoll-Rand Co., has several interesting features. It is a four cylinder drill in both re- versible and non reversible sizes. Speed is closely regulated by a governor and is automatically limited after it has passed the point of maximum horse- power. Racing and extra consumption of air is thus prevented and the wear and tear, excessive friction heat and consequent lubrication troubles, of high free speeds are largely eliminated. Speed control also prevents the burn- ing of drills, reamers and taps. Cylinder liners are of special steel fitted into the steel casing and are easily removable when it is necessary to renew them. In this way the cyl- inder case proper lasts indefinitely. With this construction it is practically impossible to dent a cylinder causing the piston to stick since a space be- tween the cylinder liner and the case walls intervenes. Crank pins are fitted with sleeves secured to them so that the wear takes place on the sleeves instead of the crank pins proper, and the sleeves can be renewed when worn. The crank pins are lubricated from the inside as well as from the out- side. All other drills have been lubri- cated by the crank shaft supposedly NEW LONG STROKE PNEUMATIC DRILL WITH SPEED GOVERNOR turning in grease in the crank case. But it has been found that centrifugal force throws the grease away with the result that there has been insufficient lubrication. In the new method by a combination of venting the case and with holes drilled through the crank as MARINE REVIEW in automobile engines, the crank pin bearings are assured of proper lubri- cation. The main valve is of large diameter and has long bearing surfaces, is air balanced to avoid wear on its bushing and is gear timed thus doing away with intricate valve mechanisms, tog- gles levers and cranks. Gearing is of helical type which gives a stronger construction and smoother operation than straight spur teeth. The crank pinion is renewable independently of the crank and therefore if damaged can be replaced without renewing the complete crank shaft. One piece drop forgings are used for the connecting rods, eliminating straps, toggles, bolts or pins to ad- just in cramped quarters. The crank shaft construction makes possible the use of solid end connecting rods and renewable crank pin sleeves. It is ac- curately counterbalanced to insure smooth operation. Assembly of the complete crank shaft with pistons and connecting rods can be made outside of the case, and then inserted’in place. This saves labor and time and the proper assembly of the parts is thus assured. New Steel Switchboard Proves Practical A new type of switchboard, con- structed of “stretcher level sheet steel” that may be used advantageous- ly in power, railway industrial and ma- rine installations has been designed by the Westinghouse Electric and Mfg. Co. This new type of switch- board is said to be light, substantial, sturdy and easily erected. The introduction of steel switch- boards has been a gradual one since 1915 when it was found that the ordi- nary slate and marble boards would not stand up under severe operating conditions. They were brittle and easily broken and were subject to stain by oil which marred the appearance of the board. In addition they were heavy and cumbersome. For some time stretcher level steel switchboards have been used on small installations in a more or less experi- mental way and have proved success- ful, so that they are now being in- stalled on larger projects. The out- standing features of this new type are its lightness, substantial nature, appearance and inexpensiveness. The erection and maintenance costs are lower than those of the slate and mar- ble boards. The erection, in addition to being cheaper, is simpler since the 335 framework is an integral part of the panels. The steel panels are given a baked enamel finish similar to that used in the auto industry. They thus present NEW TYPE OF STEEL PANELLED SWITCH- BOARD SUITABLE FOR MARINE WORK a most pleasing appearance and in ad- dition are impervious to moisture and easily resist. the corroding action of salt sea air. The hull of what will be the largest steamer of the fleet operated by the Carnegie Steel Co. in the Pittsburgh district, was launched this week at the ways of the American Bridge Co. The boat is designed for the Pitts- burgh and New Orleans trade. It has an overall length of 200 feet and is 40 feet wide and 6.6 feet deep in the center. The craft is expected to be placed in service within a few months. Recent Sales of Ships The president of the Fleet corpora- tion announced recently the following sale of tonnage: BARTHOLOMEW, lake type steel freighter, 4155 deadweight tons, 2598 gross tons, for $25,000 in cash to the Eastern Steamship Line, Inc., Boston. LAKE FLORAVISTA, lake type steel freighter, 4145 deadweight tons, 2606 gross tons, for $25,000 in cash to the Eastern Steamship Line, Inc., Boston. Both of the above lakers were sold with the understanding in the form of a contract supported by bond to perform certain altera- tions and betterments under approved plans and specifications. . TuGs, seven steel ocean-going coal burning tugs, for $42,500 each to Henry Ford, Detroit. It is understood this figure was finally agreed upon after negotiations on the rejection of a bid of $40,000 each. A 6000-Ton WoopdEN Drypock, Jacksonville, Fla., for $30,000 to the Virgin eee Dock & Engine Works, St. Thomas, Vv located at LAKE WINTHROP, lake type steel freighter, 8310 dead weight tons, 2150 gross tons, for $33,000 to the Bull Insular S. S. Co., 40 West St., New York City. The purchase of the LAKE WINTHROP by the Bull Insular S. S. Co., was a consideration involved in a _ settlement