94 Our North Land. 



2. Recording the register of the dry and wet bulb thermometers, 

 also every four hours, taking out the force of vapour, relative 

 humidity and dew point, recording the anemometer, etc. 



As the primary object of the whole Expedition is to ascertain for 

 what period of the year the Straits are navigable, all attention is to 

 be paid to the formation, breaking up and movements of the ice. 



Each station is supplied with a sun-dial and time-piece, and the 

 clock is to be tested each day when there is sunshine about noon. 

 A table of corrections is supplied for the reduction of apparent time to 

 local mean time, to this the difference of time will be applied to 75th 

 meridian, all entries being made in the time of this meridian, and 

 observations will be taken regularly at the following times through- 

 out the year, viz., 3 h. 08 m., 7 h. 08 m., 11 h. 08 m., a.m. and p.m. 



Each morning the sums and means of the observations taken on 

 the previous day will be taken out and checked over; they will then 

 be entered in the abstract books supplied for the purpose. 



After each observation during day-light the observer on duty is 

 to take the telescope and carefully examine the Strait, writing 

 down at the time all that he sees, stating direction and (when possi- 

 ble) velocity of tide, movement of ice, if any, and also describe 

 the condition of the ice, whether much broken up, solid, field, 

 etc., etc. 



Each day the time and height of high and low water is to be 

 carefully observed, and during the open season the character of the 

 tide will be carefully noted for two days before .and three days 

 after the full and change of the moon. For this purpose a post 

 marked off in feet and fractions of a foot is placed in the water at 

 low tide in some sheltered spot, and the height of the water noted 

 every half hour during the rise and fall of one tide on each of these 

 days — the height to be noted most carefully every five minutes 

 during the hour of high water and the same at low water ; the five 

 minute observations will also be taken for one hour during the 

 most rapid portion of the rise. Special observations of barometric 

 pressure are to be taken in connection with these tidal observations. 



All remarks in regard to the movements of birds, fish, etc., and 

 also the growth of grasses, will be carefully entered. 



