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Jeffery’s Saves Re-caulking Yet it adds only about one cent a foot over substitutes. JEFFERY’S MARINE GLUE Pitch, putty, and other substitutes for Jeffery’s Marine Glue, cost you more! You have to re-caulk oftener, and tinker constantly with decks to keep them tight. If you’re responsible for purchasing materials, or for the upkeep of ves- sels, investigate Jeffery’s Marine Glue. It goes farther — pound for pound; saves re-caulkings; and “stays put” in hot or cold weather without becoming sticky or crumbling out. It keeps down upkeep! JEFFERY’S No. 2 First Quality MARINE SHIP GLUE Write for Literature (LW Ferdinandécoa.¢7 152 Kneeland Street, Boston,Mass. ts 64 BN 1 4 s cS Rolled Steel “Neverslip” Floor Plates Raised Diamond Diamond and Ribbed Pattern American Pressed Steel Co. Philadelphia, Pa. The original diamond pattern floor plate. Cummings Combination Counter & Telltale Officially approved as conforming to Emergency Fleet Technical Order No. 104 IMMEDIATE DELIVERIES Continuous Rotary eight figure large numeral counter with no trouble- some reciprocating parts. Countershaft geared down | to 10 of main shaft. Positive counter with adjustable friction-drive telltale, 9-inch dial. Same hardened steel counter as used by U. S. navy on all destroyers battleships, etc. 7 To determine R.P.M. hold watch in one hand and telltale on zero with other hand, release and stop after interval of 60 seconds. We also furnish driving mechanism from main shaft to counter. Cummings Machine Works 255 Atlantic Ave. BOSTON, U.S. A. 58 MARINE REVIEW—December, 1927