TEMPERATURE OBSERVATIONS IN LOCH EARN. 



749 



Fig. 6 contains examples of some thermograph records. For purposes of re- 

 production the prick marks of the record were inked over, then traced and 

 photographed. 



In examining the records it must be borne in mind that the records in themselves 

 give no indication of the distance through which isotherms move, but simply record 



Th LZRM OCRAPH RECORDS 



LOCHZARN H £A0 AuCU5T 19/3 



NO. t. AVCUST f-5. DEPTH. I Z METRES. 



2f-nouft. Oftun, 



No.Z . Avcust 8-5. Depth, to Metres. ly-HouR DROn. 



No 3 , AvcuiT 9'tO. Depth* 15 Metres. Zf-HOUR Orv. 



No.f . August 10-11. Depth, 15 Metres, Zf-HOUR Dunn. 



No. 5. Avcust iz. Depth, iO Metres. 6-hour Drum. 



Ocptm: (3 Metres 



No 6 . Avcust ii-lf. Depth, (0 Metres. 2f-«ouR Dru, 



No. 7. August iS-l6. Depth 10 Metres Zf-nouR Druh, 



"^V^" 



No. 8 . Avcust IJ-18. Depth, 10 Metres. ZJ-hour Dr 



No. 9. Aucust 16-19. Depth 10 metres. Z^hour Dru 



No. 10. Avcust 25-26. Depth 15 Metres. 



TIME. SCALES.- z+hou«dr 



10° 16 20 



T£«P£BflTw«£ Scale. 



16 16 ]T 



19 20 21 22 23 2£ 



3 



Fig. 6. 



the variations in temperature at a given point which may be due to oscillations of 

 the isotherms. If, however, the vertical temperature distribution during the period 

 of the record is known approximately, some idea of the amplitude of the oscillation 

 may be gained. 



1. Record at 12 metres for 24 hours commencing 19 h. 31m. on 4th August. This 

 shows a slight oscillation, with a maximum about 23 h. on 4th August and a second 

 maximum about 10 hours later. The total variation in temperature does not exceed 

 2° C, but there are now and again rapid changes, showing that the temperature has 



TRANS. ROY. SOC. ED IN., VOL. L, PART IV (NO. 19). 



103 



