76 New Patents. 



patic and common pyrites ; and specimens in great plenty are to be 

 picked up on the old mining heaps. The veins at Tyne Bottom bear 

 nearly east and west, and are worked in a limestone stratum called 

 the Tyne Bottom Limestone in Mr. Westgarth Forster's section of 

 the strata which occur in that district. They were formerly very pro- 

 ductive of lead-ore ; and beautiful specimens of transparent and finely 

 crystallized carbonate of lime were obtained, but for a few years past 

 the quantity of ore yielded has not been considerable. 



SOLAR SPOTS, &C. 



On the 27th of May, thirty- two maculae or black spots, in groups, 

 were observed on the sun's disc; the largest with its umbra ex- 

 ceeded by admeasurement the circular extent of the earth, and was 

 situated near the central part of the arc which formed the lower 

 right-hand quadrant. The nucleus of this spot, or the opening in 

 the sun's atmosphere (a rational hypothesis of the late Dr. Herschel), 

 was in the shape of a mans hat t and the well-defined speckled umbra 

 nearly so, with the exception of the angular parts. Seven of the 

 largest spots were in a line near the sun's centre, and four near the 

 upper limb ; most of the others were interspersed about the largest, 

 which went off the visible part of the disc by means of the sun's 

 motion on its axis in the night of the 29th. 



The apparent angular distance of the planet Venus from the sun's 

 centre at the time of its greatest eastern elongation on the 19th, 

 was 45° 28' 30", when its appearance was like the moon at her last 

 quarter with an inverting telescope, or at her first quarter without 

 an inversion. This planet, which is the most radiant in the solar 

 system, and which now casts a faint shadow in the evening after 

 twilight, may be seen with the naked eye in the open day in clear 

 weather during the next four weeks. 



LIST OF NEW PATENTS. 



To W. Marshall, of Fountain Grove, Huddersfield, for improve- 

 ments in machinery for cutting or shearing, cropping and finishing 

 cloth, &c— Dated the 26th of April 1828.— 2 months allowed to enrol 

 specification. 



To T. Breidenback, of Birmingham, for a machine or improved 

 mode for forming tubes or rods, &c. — 26th of April. — 4 months. 



To J. GrifTen, of Withy Moor Works, near Dudley, for an improve- 

 ment in the manufacturing of scythe backs, chaff-knife backs, and hay- 

 knife backs. — 26th of April.— 6 months. 



To J. J. Watt, of Stracey-street, Stepney, for his discovery of the 

 application of a certain chemical agent by which animal poison may 

 be destroyed and the disease consequent thereon effectually prevent- 

 ed. — 26th of April. — 6 months. 



To C. C. Bompas, of the Inner Temple, Esq., for his improvements 

 in the propelling of locomotive carriages and machines, and boats 

 and other vessels. — 29th of April. — 6 months. 



To 



