60 EXPERIMENTS WITH THE PENDULUM. Chap. IV. 



for his timely interference on behalf of the poor 

 little puppies, I verily believe they would all 

 have been stolen and devoured ! Dogs may do 

 even worse than eat raven. 



I have attempted some experiments for the 

 purpose of determining the mean hourly change 

 of oscillation of a pendulum due to the earth's 

 diurnal motion ; but as mine was only Hi feet 

 in length, I failed of any approach to accuracy. 

 The mean of several observations gave 11° 47', 

 whereas the change due to our latitude is about 

 14° 30'. A single experiment gave 14° 10', and 

 this was the longest in point of time of any of 

 them, the pendulum having swung for thirty-six 

 minutes. 



24:th. — Furious N.W. and S.E. gales have 

 alternated of late ; the ship is housed over, to 

 keep out the driving snow ; so high is the snow 

 carried in the air that a little box perforated 

 with small holes and triced up 50 feet high is 

 soon filled up ; this box is supplied morning and 

 evening with a piece of prepared paper to detect 

 the presence and amount of ozone in the atmos- 

 phere ; it is a peculiar pet of the Doctor's. 



At eight o'clock this evening I noticed the 

 falling of a very brilliant meteor; it passed 

 through the constellation of Cassiopceia in a 

 N.N.E. direction before terminating its visible 



