OF NAUTICAL INSTEUMENTS. 



95 



! 



PIG. 998. 



1009. Current Meter (DOUBLE), to be used as a log (see surveying 



instruments, No. 519, page 71). 



1010. TIME GLASSES, in plain oak frames, 2 hours, 3s. 6d. ; 1 hour, 



Is. 8d. ; hour, Is. 6d. ; i hour . . 014 



*** These glasses, if with metal sand or fancy hardware frames, would be 

 about double the above prices. 



1011. Log Glasses^ 14 or 28 seconds, in oak frames, with best metal 



Fio. 1004. sand ' P er P air 026 



1012. LOG GLASSES,' in brass frame, hermetically sealed, per pair . 050 



1013. TEA BROKER'S SAMPLE TIME GLASS, in plain wood frame . 016 



1014. Auctioneer's One Minute Time Glasses, in neat turned wood case, for the waistcoat 



pocket . . . . . . . 056 



BUNTING in every variety. I ROYAL STANDARDS, ENSIGNS, UNION 



SIGNAL FLAGS JACKS, AND FOREIGN FLAGS, of every 



CODES OF SIGNALS | kind. 



In addition to the preceding List of Nautical Instruments, there are several others 

 in constant use referred to under their respective classes, thus : 



Marine Barometers and Sypicsometers, see " Meteorological Instruments," pages 



4, 5, and 40. 



ANEROID BAROMETERS (now much required for marine purposes), pages 34 and 35. 

 ORDINARY MARINE AND DEEP SEA THERMOMETERS Nos. 26, 27, 48, Salinometers, etc. 

 Hygrometers (now much used at sea, especially in connection with the barometer, the 



best form for marine purposes being Mason's), see Nos. 50 to 57, and 185. 

 Anemometers and Air Meters, for measuring the force and velocity of the wind and 



currents of air, see pages 25 to 30. 

 Marine Telescopes, see pages 119 and 120. 

 IMPROVED BINOCULAR AND NIGHT GLASSES, see pages 125 to 127. 



Amongst the books supplied by L.CASELLA which bear on the theory and practice of 

 navigation, great circle sailing, the law of storms, etc., are also the maps, charts, and 

 sailing directions, published by the Admiralty, and others including the latest surveys 

 and discoveries, books and maps of the Ordnance Survey of Great Britain, and others. 

 English and foreign publications of the meteorological department of the Board of 

 Trade, as wind and current charts, etc., etc. 



