56 



REPORT — 1903. 



the Naturforscherversammlung in Kassel, L. Prandtl in Hanover read a 

 paper about a uniform notation in vector algebra. He recommends the 

 notation of Gibbs. 



A Committee was appointed to consider the whole question. 



Meteor olo(] leal Ohser rations on Ben Nevis. — Report cf the Committee, 

 considinf] of Lord M'Larex, Professor A. Crum Brown (Secreianj), 

 Sir John Murray, Professor Copeland, and Dr. Alexander 

 BuCHAN. (JDvaxvn up hy Dr. Buchan.) 



The Committee was appointed as formerly for the purpose of co-opeiating 

 ■with the Scottish Meteorological Society in making meteorological obser- 

 vations at the two Ben Nevis Observatories. 



The hourly eye-observations have been made at the High Level Obser- 

 vatory by Mr. Rankin and his assistants, by day and night without interrup- 

 tion. At the Low Level Observatory in Fort William the self-registering 

 instruments have been in continuous use throughout the year, 



The health of the observers has been good. The Directors cordially 

 thank Messrs. Robert Aitken, W. Gentle, and H. D. Robb for their valuable 

 services as volunteer observers, thus rendering it possible to give the mem- 

 bers of the regular staff vacation and rest during the summer. 



The principal results of the observations made at the two Observatories 

 during 1902 are detailed in Table I. 



Table I. 



1902 



Jan. I Feb. jfn^g], April | May | June \ July Aug. i Sapt. I Oct. | Nov. Dec. ! Year 



Mean Prflssure in Inches. 



Ben Nerls Ob- 

 servatory 

 Fort WiUiam 

 Differences . 



25-316' 25-199 25-080: 25-295 



29959 

 4-G43 



29-841 

 4-li42 



29-650 29-894 

 4-570| 4-599 



25-350 



29-958 

 4-608 



25-4261 25-4261 25-365 



29-924129-945 29-863 

 4-498! 4-519 4-498 



25-476 



29-990 

 4-514 



25-351 1 25-186 



29-904 29-752 

 4-553 4-566 



25-252 



29-874 

 4-622 



Extremes of Temperature : Maxima. 



Ben Nevis Ob- 

 servatory 

 Fort William 

 Differences . 



Ben Nevis Ob- 

 servatory 

 Fort William 

 Differences . 



BenNevisOb- 



servatory 

 Fort William 

 Differences . 



Extremes of Temperattire : Minima. 



6-G 



12-4 

 68 



14-9 

 C-8 



12-8 I 16-3 t lG-1 



2G-2 

 13-4 



28-0 

 117 



30-6 

 14-5 



23-8 



39-9 

 16-1 



28-1 



41-5 

 13-4 



28-1 



41-2 

 13-1 



23-1 I 24-9 



36-1 

 13-0 



Rainfall in Inches. 



31-2 

 6-3 



16-31 I 



905 

 7-26 



20-3 



35'6 

 15-3 



13-2 



24-4 

 11-2 



25-310 



29-879 

 4-669 



30-7 



46-4 

 15-7 



66-4 



80-0 

 240 



66 



12-4 

 6-8 



7-86 23-43 167-1 



3-73 9-14 

 4-13 ! 14-29 



64-C 

 92-7 



