' TERRA NOVA " LOGS. 



The Terra Nova logs were kept in the standard form of the London Meteorological 

 Office (Form 131) and the instructions there given followed as closely as conditions 

 permitted. The following additional notes, however, were pasted in the front of each 

 log by the observer : 



Position. The position is given as accurately as possible for every four hours 

 instead of giving course, &c., as laid down in the form. 



Current. Current observations having been made a special feature are recorded 

 in a book by themselves. 



Special observations of a N on- Meteorological character. Zoological, hydro- 

 graphical and other subjects being each made a special study of, are recorded in 

 their own books. 



Colour of Sea. The numbers found under this heading refer to " Code des 

 Couleurs classes d'apres la methode Chevreul simplifies par Paul Klingksieck et Th. 

 Valette." 



Colour. When colour is mentioned with a number, it refers to the above code. 

 Temperature. When given without a decimal point is to the nearest degree 

 only. If read closely and is an exact degree, it is logged thus : 67-0. 

 Cloud Velocity. The following scale is used : 



(o) Stationary Q Slow Fast 



(7) Very slow (2) Moderate Very fast 



Cloud density. Indicated by the suffixes 0, ] , 2, 3, thus : 10 3 ; 6 



Very light cloud 



1 Light cloud 



2 Moderately heavy cloud 



3 Heavy dark cloud. 



Green Flash. When sun sets on a clear horizon immediately it has disappeared, 

 a tiny patch of brilliant green is sometimes seen where he was. Entries are made of 

 this phenomenon, when observed under this heading. 



Nimbus. This name has been used for rain clouds even when rain is not falling 

 at the actual moment. 



Rain is classified as follows : 



Drizzle Heavy 



Slight Very heavy 



Moderate Torrential 



The suffix - ly is used when only an approximate direction can be given, for 

 instance, in the case of waves or swell at night, light quarterly winds with the ship 

 under weigh, direction of a confused sea, &c. Thus : 



N ly . . . . somewhere in the direction of N. 



When a suffix is not used it is considered that the exact direction has been 

 obtained. 



Time. 12 hours fast on G.M.T., except where otherwise stated. 



ORIGINAL RECORDS. 



The original records and the papers used in working up the observations are stored 

 in the library of the Meteorological Office, South Kensington, London, where they may 

 be examined by permission of the Director. 



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