HARDWICKE'S SCIENCE-GOSSIP. 



161 



Rising, Southing, and Setting of the Principal Planets 

 at intervals of Seven Days in July. 



beginning of the week, and the lowest 29*37 in. on 

 Wednesday afternoon. The mean temperature of the 

 air was 55*9 deg., and 2*6 deg. above the average. 

 The direction of the wind was variable. Rain fell on 

 two days of the week, to the aggregate amount of 

 C32 in. The duration of registered bright sunshine 

 in the week was 39*4 hours, against 40*6 hours at 

 Glynde Place, Lewes. 



For the week ending 26th May the lowest reading 

 of the barometer was 29-64 in. at the beginning of 

 the week, and the highest 30*26 in. on Monday 

 evening. The mean temperature of the air was 54*0 

 deg., and 1*3 deg. below the average. The general 

 direction of the wind was north-easterly. No rain 

 was measured during the week. The duration of 

 registered bright sunshine in the week was 62*3 

 hours, against 57*1 hours at Glynde Place, Lewes. 



For the week ending June 2nd the lowest reading of 

 the barometer was 29*55 in. on Wednesday morning, 

 and the highest 30*07 in. on Friday evening. The 

 mean temperature of the air was 55*8 deg., and 1*3 

 deg. below the average. The direction of the wind 

 was variable. Rain fell on Wednesday, to the 

 amount of o*l6 inch. The duration of registered 

 bright sunshine in the week was 43*8 hours, against 

 55*2 hours at Glynde Place, Lewes. 



For the week ending June 9th, the highest reading 

 of the barometer was 29*96 in. on Tuesday morning, 

 and the lowest 29*40 in. on Saturday morning. The 



mean temperature of the air was 58*9 deg., and 0*7 

 deg. above the average. The general direction of 

 the wind was variable. Rain fell on four days of the 

 week, to the aggregate amount of 0*17 of an inch. 

 The duration of registered bright sunshine in the 

 week was 21*2 hours, against 13*4 hours at Glynde 

 Place, Lewes. 



For the week ending June 16th the highest reading 

 of the barometer was 29*94 in. on Sunday evening, 

 and the lowest 29*52 in. on Tuesday afternoon. The 

 mean temperature of the air was 57*1 deg., and 1*9 

 deg. below the average. The direction of the wind 

 was variable. Rain fell on two days of the week, to 

 the aggregate amount of 0*54 of an inch. The 

 duration of registered bright sunshine in the week 

 was 51*7 hours, against 49*2 hours at Glynde Place, 

 Lewes. 



The mean temperature in July is at the Land's 

 End, Hereford, Lincoln and Yarmouth 62 , at 

 Haverford West, Liverpool, Gateshead and Hull it 

 is 6i°, at Carlisle, Berwick, Newcastle and Middles- 

 bro' it is 6o°, but inland through the greater part of 

 England it is 63 , and in the district about twenty 

 miles round London, it is 64 . 



The mean rainfall for July is more equal than that 

 of any other month, being about two inches for the 

 greater part of our island varying only to three inches 

 and occasionally four inches along the West coast. 



SCIENCE-GOSSIP. 



M. Perrotin has been making some important 

 observations of the channels in Mars, and has de- 

 scribed various important modifications that have 

 taken place in these appearances since they were 

 first observed in 1886. The triangular continent, 

 somewhat larger than France (the Libya of Schia- 

 parelli's map), which at that time stretched along 

 both sides of the equator, and which was bounded 

 south and west by a sea, north and east by channels, 

 has disappeared. The place where it stood, as in- 

 dicated by the reddish-white tint of land, now shows 

 the black, or rather deep blue colour of the seas of 

 Mars. The Lake Mceris, situated on one of the 

 channels, has also vanished, and a new channel, 

 about 20 long and 1° or 1*5° broad, is now visible, 

 running parallel with the equator to the north of the 

 vanished continent. This channel forms a direct 

 continuation of a previously existing double channel, 

 which it now connects with the sea. Another change 

 is the unexpected appearance about the north pole of 

 another passage, which seems to connect two neigh- 

 bouring seas through the polar ice. 



Much interest has lately been taken in an operation 

 in beneficial surgery in which the object was the 

 transplantation of a portion of the nerve of a rabbit, 

 nearly two-and-a-half inches in length, from the 



