XETEOROLOG-ICAL OBSERVATIONS iVIADE AT CHISWICK IN 1900. 361 
equipment of this meteorological station, but was not intended to include 
the unverified thermometer mounted on a post, which has been placed 
there in order to test the merits of this method of exposing a Six's 
thermometer for ordinary garden observations. 
In May last the Six's thermometer previously in use not having a 
sufficiently open scale was replaced by a new and larger thermometer of 
the same pattern. Advantage was taken of this change of instrument to 
shorten the post, so that the thermometer when in position on the north 
side of it has now its bulb only 3 ft., instead of as before 5 ft., above the 
grass in the instrument enclosure. Similar projecting flanges to those 
previously employed were fastened to the sides of the post in order to 
protect the thermometer from the sun during the early morning and late 
afternoon hours. Also, in the same way as before, the instrument is partly 
sheltered from rain by a sloping piece of zinc secured to the top of the 
post and projecting over the thermometer. 
Since this thermometer was placed in position the highest and lowest 
temperatures registered by it have been entered daily at 9 a.m. in a 
little book kept specially for the purpose. But as only entries for eight 
months are available for 1900 I propose leaving the discussion of this 
method of observation until my next RejDort. 
