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DROP FORGED WELDLESS EYE BOLTS ROLLED THREAD GALVANIZED OR PLAIN 4” DIAM. WITH EYE %%” INSIDE 54" 66 66 46 KR" 6 34" 66 6 Cay 134” 66 1” 46 os se 1” ee QUICK SHIPMENT OLIVER IRON AND STEEL CORP. 1001 MurieEt Sr. PITTSBURGH, PA. ESTABLISHED 1863 Engineering Specialties REFLEX WATER GAGES Used on all types of boilers by all the Principal Navies of the World “THE WATERSHOWSBLACK” ADVANTAGES Quick and reliable observation of the water level. Safe, sure and durable at high pressures. Not af- fected by cold air drafts. Most effective protection against injuries to boilers and workmen. Easily ap- plied to all types of gage glass fittings. When filled with WATER the Reflex Gage always appears BLACK. When empty it instantly shows WHITE. No mistake pos- sible. This feature alone is worth many times the cost of the Reflex. Send for catalog of Water Gage Apparatus. MANUFACTURED BY THE JERGUSON GAGE & VALVE CO. WINTER HILL, SOMERVILLE, MASS. Sharper, Clearer Bearings Through Kolster Precision Ey eS IT Cy iy Ce acres S. 8. [Iroquois of the Clyde Line installs the NEW Kolster Radio Compass In the march for greater safety “on the seas” an- other well-known steamship—the Iroquois of the Clyde line—has been equipped wtih the New Model Kolster Compass. With this installation the Iroquois can honestly boast of equipment second to none. It possesses a distinctly new, yet thoroughly tested Radio Compass in which sharper, clearer bearings are now as definite as the day. The New Model Kolster Compass, from appearance to technical improvements, is so immeasurably supe- rior to any past models that it creates enthusiastic comment everywhere. Fifteen vital improvements have been added, including —a new-type enclosed loop —original visual signal unit —new and improved compensator —positive uni-directional indicator —new super-selective 8-tube receiver and ten other betterments, all of which make for new efficiency in the pilot-house. Send for booklet, pic- turing the “15 vital improvements.” FEDERAL TELEGRAPH Co. 25 Beaver St., New York City Hobart Building, San Francisco Makers of the Kolster Mobile Radio Beacon MARINE REVIEW—August, 1927