346 



Intclliiie7ice aiid Miscellarieous Articles. 



To find the filament in red blood-discs, Dr. Barry recommends the 

 blood of a batrachian reptile, such as the frog or newt, on account 

 of the large size of the discs in these animals. The blood should be 

 examined just before its coagulation, as well as at various periods 

 during the formation of the clot. Dr. Barry has usually added one 

 of the above reagents, or nitrate of silver. 



ON THE TOTAL ECLIPSE OF THE SUN, JULY 7, 1842 = 

 (From the Royal Astronomical Society's Monthly Notice for March 1842.) 



Path of the Moon's Shadow over the Southern Part of France, the 

 North of Italy, and part of Germany, during the Total Eclipse of the 

 Sun on July 7, 1842*. By Lieut. W. S. Stratford, R.N. 



During the total eclipse of the sun on July 7, 1842, the moon's 

 shadow will pass over Spain, the south of France, the north of Italy, 

 and part of Germany ; and it may induce travellers and others in 

 those countries to prepare for the observation of this important 

 phaenomenon, if the means of so doing be furnished. 



The following table has, therefore, been computed to enable them 

 to trace the path of the moon's shadow on a large scale, and with 

 very considerable accuracy. 



It contains for each minute, from l?"^ 34'" 39= to l?"* 46" 39', 

 mean astronomical time at Greenwich, the geogTaphical positions (the 

 longitudes being reckoned from Greenwich) of points on the earth's 

 surface, where the following phenomena occur : — 



1 . Contact of the upper limbs of the moon and sun. 



2. Contact of the centre of the moon and sun. 



3. Contact of the lower limbs of the moon and sun. 



• July 8, civi/ tunc 



