64 



CONTENTS. 



differ in velocity in different cases, aud 

 ihus to produce the different degrees of 

 temperature. Wiiatever deci.sion be ulti- 

 mately made resjiecting these opinions, it 

 is certain that there is matter moving in 

 the space between us and the heavenly 

 bodies capable of communicating heat; the 

 motions ot which are rectilineal: thus the 

 solar rays produce heat in acting on the 

 surface of the earth. The beautiful ex- 

 periments of Dr. Hcrschel have shewn 

 that there are rays transmitted from the 

 sun which do not illuminate ; and which 

 yet produce more he.ttt than the visible 

 rays ; and Mr. Ritter and Dr. Wollaston 

 have shown that there are other dixnsible 

 rays distinguished by their chemical 

 effects. 



The different influence of the different 

 solar rays on vegetation have not yet been 

 studied ; but it is certain that the rays ex- 

 ercise an influence independent of the 

 heat they produce. Thus plants kept in 

 the dark in a hot-house grow luxuriantly, 

 but they never gain their natural colour's ; 

 their leaves are white or pale, and their 

 juices watery and peculiarly saccharine. 



When a piece of sealing-wax is rubbed 

 by a woolen cloth, it gains the power of 

 attracting light bodies, such as feathers or 

 ashes. In this state it is said to be elec- 

 trical'^ and if a metallic cylinder, placed 

 upon a rod of glass, is brought in contact 

 with the sealing wax, it likewise gains the 

 inomentary power of attracting light 

 bodies, so that electricity like heat is com- 

 municable. When two light bodies receive 

 the same electrical influence, or are elec- 



trified by the same body, they repel each 

 other. To be Continued. 



Chinese Mulberry Italian for white) 

 Mulberry, silk-worm and silk. 



As the relative value of these trees to 

 supply food for the silk worm is at pre- 

 sent a contested point; it is suggested that 

 persons who have the power to make the 

 following experiments, will do so the fol- 

 lowing season, and publish the result for 

 the benefit of others. 



1st. Feed them separately, one parcel 

 of worms entirel}^ upon one kind of leaves, 

 and another parcel entirely upon the other 

 kind, and note the relative health of the 

 worm also the quality and quantity of silk 

 produced from the same number of worms. 



2nd. Feed two other parcels, one of 

 them the first half of the season upon one 

 kind of leaves, and the other half upon the 

 other kind of leaves. 



3d. Reverse the timeof feeding the other 

 parcel, with each respective kind of leaves 



4th. Place an equal quantity of each 

 kind of leaves, together with another par- 

 cel of worms, during the season, and ob- 

 serve which kind is preferred, and the 

 relative value and quantity of silk, and 

 health of the worms in each parcel, includ- 

 ing the whole stated above. 



5th. Make an estimate of the relative 

 labour and expense, of gathering the dif- 

 ferent kinds of leaves to produce a given 

 quantity of silk. 



The experiments might probabl)^ be 

 extended, so as to furnish other valuable 

 information. — Rd. Ob. 4* Hec. 



eOA^TSATS ofJ^lo. '5. J'^oh S. of OMSEMirmn ^* KECORn, 



A concise view of llie Theory of Vegetalion, illustrated in the culture of the Melon 49 



Improved Wheels and Axles of C:irringeB, to prevent accidents 50 



On the Analysis of Vegetable and Animal matter.. . 51 



On a mode of Training Vines 52 



On I'otatoes 53 



On certain improvements in Matliematicul Instruments 53 



On a method of Freezing at a Distance 53 



On a plan of a Fruit Itoom 54 



On the Transplantation of Blossom Buds 54 



On the proper slock for the Moore Park. Apricot 54 



On the good effects of Watering the Frozen branches of Fruit Trees 54 



On the early puberty of the Peacli Tree 55 



Directions for covering the soil in Hot Beds, and sowing small seeds 55 



Method of preserving Apples and l^ears 56 



On a process to destroy Wasps 56 



On the manner of destroying Green Flies • 56 



A method for removing colour from Vinegar, Wine, an J many other Liquors 56 



Process to make Indelible Ink 56 



A Treatise upon Electricity ^ 57 



Definition of Terms beginning with the Letter B, extending to Bau 58 



On a process to preserve Beef and Pork 61 



Sir H. Davy's Agricnltural Chemistry ^J 



Chinese Mulberry, Italian (or white) mulberry silk-worm and silk 64 



