The following text may have been generated by Optical Character Recognition, with varying degrees of accuracy. Reader beware!

32 muths, price $3.50. Any of these books can be bought from the Penton Pub- lishing Company, Cleveland, Ohio. But I think a student will be well repaid for the extra expense by buy- ing the Henrich Azimuth Book. The process of finding the correct bearing in this book is simplified very much and' there is less chance of mistake. In home practice you will also need something to represent a boat. Noth- ing very elaborate is required. We need not look for exactness. When you understand the workings of the Pelorus you will have gained your point; later on you may have a chance to try your skill abuard a boat where everything is exact. A piece of rough board, pointed at one end, will do to represent a boat. Make it so it will swing on a pin in the middle. You can then turn it around to head in any direction. Your compass and Pelorus can then be set on this, "Ship" the lubber line of each in line' with the pointed end. Say, for example, that your boat's compass shows north. Then set your compass to show north also. Point wour sight bar at thé sun and the lower pointer will show you the bear- ing (or Azimuth). This gives you the bearing of the sun as shown by your compass. If your compass is "not correct then the bearing will not be correct. You.-will find the correct bearing in the Azimuth Book. It is not so easy to find the cor- rect bearing in the book as you might think. But it is quickly done when you have once mastered the subject. HOW TO FIND THE AZIMUTH IN THE BOOK. In order to enter the Azimuth book at the right page and find the required Azimuth you must know the follow- ing three things: (1) The latitude of your ship (the position of your ship on the earth's surface). 11 hrs. 56 m. to 11 hrs. 24 m. THE Marine REVIEW (2) The latitude of the Sun or other heavenly body (called Declination). (3) The correct time. Sun time for bearings of the Sun, Sidereal time for the moon, planets and stars. You figure either kind from a watch or clock set to Standard time. Below we show a reproduction of a part of a page of Henrich's Book of ' Azimuths. On the upper left hand corner you read "11 hrs 56 m to 11 hrs 24 m." This means that bearings can be found below for any time between 11:56 A. M. and 11:24 A. M. On the upper right hand corner you read "O hrs 4 m to O hrs 36 m." This means that bearings can be found below for any time between 12:04 and. 12:36 PP: -M. (or noon.) Across the top you read "Declina- tion--Opposite to--Latitude." This means that if the Dec'ination of the Sun is south the latitude of the ship must be north or if the Declina- tion of the sun is north the latitude of the ship is south. In another part of the book you will.see where this line reads "Declination--Same as-- Latitude." This means that if the Declination of the Sun is north then the latitude of the ship is also north. The column at the -left: shows the time * A.M: 1-11-56; (11-52, etc... Dhe column at the right shows the time P. M. 0-04, 0-08,: etc.: Bearings in this book are shown every four: min- bess a : pier The second column at the left shows latitude. The Great Lakes are all' between latitude 49 and 41 north. The row of figures across: the top show Declination-- Oe eee | 6 | ete. Now we will find a bearing (or azimuth). We will say, for example, that the Sun time is 11-56, our ship is in north 0 hrs. 4 m. to O hrs. 36 m. AZIMUT OR TRUE BEARING. 3 3 : Loe 2 DECLINATION--OPPOSITE TO--LATITUDE. = | Time .M.| % | P.M. a ae ae ome eeeeeeedae ---- He Mo Or ae fet | Be | 49 | ek Bes ze | 88 pe | 10° |; 11° | 12° | 18° | 14° [°° Ju, ° ° ° ° ° ° Oy:4 +10: ° Ook ok fo} ° ° ° fo} 49 | 178.7|178.7|178.7| 178.7| 178.8| 178.8 | 178.8 178.8 1178.8 |178.8 1178.91178.9 48 | 178.7/178.7|178.7| 178.7| 178.7] 178.8|178.8/178.8|178.8 1178.8 11788 178.9 1189 188 113° 28 47 ) 178.6 |178.7 |178.7/178.7/178.7| 178.71178.8 1178 8|178.8 |178.8 |178.8|178.8|178.9|178.9/178.9 | 47 46 | 178.6/178.6|178.7| 178.7| 178.7| 178.7} 178.7|178.8|178.8 |178.8 178.8 178. 11-56 | 45 | 178.6 178.6 |178.6| 178.7|178.7| 178-7 | 178.7/178.7 178.8 1178.8 ive.cl tye 118.8 1183 1189 a5 | 0-04 : " es mas 178.6{178.6| 178.7) 178-7 |178.7|178.7|178.7 |178.8 |178.8|178.8|178.8|178.81178.9 | 44 -5 178.6 |178.6| 178.6] 178.6|178.7| 178.7|178.7/178.7 |178.8 |178.8 42 | 178.5 |178.5 |178.6|178.6|178.6|178.7|198.7| 178.7 |178.7 1178.7 |178.8 1188 1188 11838 1188 42 41 | 178.5 178.5 /178.5| 178.6] 178.6) 178.6] 178.6|178.7/178.7|178.7 |178.7| 178.8| 178.8|178.8|178.8 | 41 49 |177.4/177.4|177.4|177.5| 177.5| 177.5/177.6/177.6|177.6|177.7 177.71 48 |177,3 |177.3 |177.4|177.4|177.5!177.51177.5/177.6 1177.6 1177.6 ine ee ies ies ITs 4s a as 177.3 (177.4) 177.4|177.4 | 177.5 |177.5 | 177.5 |177.6|177.6 |177-6| 177.71 177.7|177.7/ 177.8 | 47 6 -2)177.3 |177.3/177.4/177.4| 177.4 | 177.5 |177.5 |177.5 |177.6 1177.61 177.7 W152 | 45 | 177-2 /377-2 |177.3).177.3] 177.4) 17774] 177.44177.5 [177.5 |177.6 [177.61 Lee 6l deea| ayeel pees | a8 0-08 a A re nee 1g 177.3) 177.4|177.4/177.4|177.5|177.5 |177.6| 177.6] 177.6|177.7/177.7 | 44 : : -2)177.2/177.3|177.81177.4|177.4./177.5 1177.5 1177.5 42 | 177-0) 177.4 1177-1] 177.2) 177.2|177.3|177.3 |177.4 (177.4 (177.8. 1177.8) LTT | tesel geeelaeee | a8 40 177.01177.01277.11177.11 277.2] 177.2) 177.3 | 177.3 |17734 [177.4 1177.51 177.5 | 177.51177,61177.6 | 41 FROM HENRICH'S BOOK OF AZIMUTHS. latitude 42, and the sun is in South Declination 4. You should now pe able to find the Azimuth you require 178.7. (178 7/10). You: had: petees call this 179, as it is nearer 179 than 178. Don't try to work fractions ip your problem--take the nearest full degree. Therefore our bearing is 179 east. It must be east if taken any time before noon; it would be west if taken any time after noon. Of course in working the above problem it is necessary that you know just how to find the Sun time, the latitude of the ship and the Declina- tion of the sun. For those that do know these things the problem is | very simple. But for those who can not figure sun time, and find latitude and Declination we advise that they master the whole subject before go- ing farther. .On: our Pelorus. cards (shown under the head of "Pelorus ecards") you will find all the dat needed to take bearings of the sun and to find the azimuth in the book, But you should understand the whole subject thoroughly before going far: ther. RYAN-TANNING BOAT HAND- LING GEAR. The American Association of Mas- Mates and Pilots adopted the following resolution at their annual ters, \ meeting: "*The Ryan-Tanning Boat Handling Gear' was fully demonstrated before the national officers and _ representa- tives of the American Association of Masters, Mates and Pilots, in con- vention assembled at Washington, D. © Jan $8 to: 23, 1909, "We desire to go on record as hay- ing unanimously endorsed this de- vice as an equipment that we believe all steam vessels should carry, for the reason that we feel sure it would be a great improvement to the equip- ment ofall vessels, for the safety of both life and property at sea and on the inland waters of the United ptates,?' A new: 20-ton refrigerating plant in- stalled in the training station at New- port, R. I., by the Kroeschell Bros. Ice Machine Co., of Chicago, has just been given a satisfactory trial run. The plant is required to cool 300 galions of drinking water an hour to 40 degrees, keep the refrigerating room for meats in barracks B down to 22 to 28 degrees ana frceze 214 tons of ice a. dae The plant is of the carbonic anhydride system which, it is contended, is more economical than ammonia.