NOTES SUR LES INVENTIONS ÉTRANGÈRES. a déposé une demande de brevet pour le rendu des couleurs d'aniline teints et imprimés de façon permanente. Le tissu est d'abord préparé avec stannate de soda avant de passer à travers une épaisse solution de celle de tanin après laquelle il est soit imprimé ou teint à l'aniline (couleur mauve solferino magenta &c.) puis soumis à l'action de la vapeur. Couleurs d'aniline n'ont pas encore été rendus de façon permanente qu'il porte sur l'action de la lumière solaire sur eux. Ils changent rapidement en influence solaire mais peut être lavé sans décoloration. twisted canon a été breveté par W. Perry de l'Angleterre. Il
Cette image peut avoir des imperfections car il s’agit d’une image historique ou de reportage.
NOTES ON FOREIGN INVENTIONS. has applied for a patent for rendering printed and dyed aniline colors permanent. The cloth is first prepared with stannate of soda then passed through a thick ened solution of tannin after which it is either printed or dyed with the aniline color (magenta solferino mauve &c.) then subjected to the action of steam. Aniline colors have not yet been rendered permanent so far as it relates to the action of sunlight upon them. They change rapidly upon solar influence but can be washed without fading. twisted gun barrels has been patented by W. Perry of England. It consists in rolling the skelp of iron in such a manner that when twisted into a helix for a barrel it forms what is called a mould with the edges overlapping instead of abutting one against the other as in the old method of rolling. During the subsequent process of rolling to weld and elon gate the metal of a barrel the action tends to press the joints together whereas the old method of elon gating the barrel tended to open the welded joints. plied to the surface of the glass when the metal is soon deposited in a bright film at the ordinary tem perature of the atmosphere. This is considered to be perhaps the most simple method of depositing silver on glass yet discovered. Other modes require the ap plication of high heat to produce the deposition of the metal from a nitrate solution. sion and consequent leakage. To prevent this evil A. Wall of London places on the ends of boiler tubes where the flame enters them short movable tubes which act as protectors to the main tubes. He also coats these short tubes with an anti-corrosive metal such as silver or gold-a rather expensive ap plication we think. Bordeaux France has applied for a patent for a mode of obviating local attraction from affecting the action of the compass needle in iron vessels. He places un der the card of the needle a number of magnetized needles laid parallel to each other with their points due north and south and c
