578 



Proceedings of the Asiatic Society. 



[JuNfi, 



strument should be erected or equal altitudes of the sun should be daily observed 

 and the equation of time carefully applied. 



A groundplan of the adjacent shore should accompany the register, shewing its 

 place. And as the times and heights of the tides are much influenced by the prevail- 

 ing winds and weather, a table containing a brief method of expressing them is 

 hereto annexed, also a blank form shewing the mode in which the observations 

 should be registered, and it is strongly recommended that they should be entered the 

 moment they are made, so as to avoid any reliance on the memory. 



For the more elaborate observations, a few stations will be sufficient, and proba- 

 bly the following places will afford eligible spots for planting the guages. 



Some port in the Gulf of Cutch : — Bombay: — some port near Cape Comorin :— 

 some port near the head of the Bay of Bengal : — some port on the Coast of Ava : — 

 Prince of Wales Island : — Singapore : — Macao. And it would also be very desirable 

 to have a station in the Red Sea, and another in the Gulf of Persia. These Regis- 

 ters should be continued for at least fifteen months, whereas 3 or 4 months will be 

 a sufficient period for the slighter observations first described, but then their places 

 cannot be too much multiplied, and perhaps it would be advisable to repeat them 

 during the opposite monsoon. 



(Signed) F. B. 



2nd February, 183S. 



FORM OP OBSERVATIONS. 



Register of Tides, observed at in the month of 



183 



High Water. Low Water. 



Time— Height.iTime— Height. 



h. m. h. m. h. m. h. m. 



Wind. 

 Direction— Force. 



Turn of Stream- 

 Flood— Ebb. 

 h. m. h. m. 



Figures to denote the Force of the Wind. 

 Calm. 



Light air, Or just sufficient to give steerage way. 



Light breeze, ...... . ~\ Or, that in which a well f 1 to 2 knots. 



j conditioned man of war | 



with all sail set, and<{ 3 to 4 knots, 

 clean full, would go in | 

 smooth water from, [5 to 6 knots, 

 f Royals, &c. 

 ■ 

 Single-reefed 



Gentle breeze, )■ 



I 

 Moderate breeze, J 



Fresh breeze,. 

 Strong breeze, 



Moderate gale, 



1 



topsails 

 topgallant sails. 



Or, that to which she 

 \ could just carry in chase <( Double-reefed topsails, jib, 



I full and by, &c. 



Triple-reefed topsails, &c. 

 Close-reefed topsails and 

 courses. 



10 Whole gale, Or, that with which she could scarcely bear close- 



reefed main-topsail and reefed foresail. 



11 Storm, Or, that which would reduce her to storm-staysails. 



12 Hurricane, Or, that which no canvas could withstand. 



If the above mode of expression were adopted, the state of the wind might be 

 regularly marked, every hour, in a narrow column on the log-board. 

 Letters to denote the state of the Weather. 

 6— Blue sky ; whether with clear or hazy atmosphere. 

 c— Cloudy ; but detached opening clouds. 

 d — Drizzling rain. 

 f— Foggy/ thick fog. 

 g— Gloomy dark weather. 



* By the turn of the stream is not meant the turn of the inshore tide, but the turn 

 of the flood and ebb streams, when off shore or in the anchoring roads. This may 

 be perceived from the tending of the vessels at anchor or their buoys in calm wea- 

 ther. If there are neither vessels nor buoys, a small substitute might easily be 

 secured in a proper place for the purpose. 



f If several persons have been employed, put their initials in this column, and the 

 names at length in next page. 



