vi PREFACE 



ends. His scheme was largely based on the relation of the barometric readings at the 

 two stations, and he expected to be able to show that variations of weather are as 

 intimately connected with changes in the vertical gradient of pressure as they are 

 already known to be with changes in horizontal gradients. This method of dis- 

 cussing high- and low-level observations can only be applied to readings at a 

 high-level station, where the barometer occupies a fixed position at a definite 

 altitude : records got from kites or balloons are useless for this purpose. 



The Appendix to this volume consists of a paper by Mr R. C. Mossman on the 

 Meteorology of Glen Nevis from October 1901 to February 1902, an account of the 

 work done at the temporary station half-way up Ben Nevis, and three short papers on 

 Temperature and Wind by myself. 



The Board of Directors of the Ben Nevis Observatories is dissolved, and there is now 

 no scientific body specially organised for the study of these observations, but their pub- 

 lication in the Transactions of the Royal Society of Edinburgh renders them accessible 

 to any worker in meteorology who may desire to make use of them. 



K. T. OMOND. 



July 1910. 



