|
Most Viewed- Never-yielding Cement- The Deforming Mirrors - Aigrettes - A More Powerful Fulminating Powder - A Liquid That Shines In The Dark - A Lamp That Will Burn Twelve Months Without Replenishing - Balloon Wheels They Are Made To Turn Horizontally: They Must Be - To Make Artificial Coruscations - Artificial Illuminations - Another Way - The Magnifying Reflector - Another - The Hour Of The Day Or Night Told By A Suspended Shilling - Another Invisible Green Ink - To Spin Sealing-wax Into Threads By Electricity - Easy And Curious Methods Of Foretelling Rainy Or Fine Weather - A Powder Which Catches Fire When Exposed To The Air Least Viewed- Stars With Points- To Take Impressions Of Coins Medals &c - To Tell A Person Any Number He May Privately Fix On - The Boundless Prospect - Vegetable Air-bubbles - The Electric Aurora Borealis - To Tell The Amount Of The Numbers Of Any Two Cards Drawn From A - To Tell The Amount Of The Numbers Of Any Three Cards That A Person - The Divining Card - The Card In The Opera Glass - To Make Pictures Of Birds With Their Natural Feathers - The Mysterious Writing - Winter Changed To Spring - The Miraculous Portrait - The Revolutions Of The Heavenly Bodies Forming What Is Called The Electrical Orrery Let A Single Wire With The Extremities Point - The Electric Explosion - To Tell The Number Of Points On Three Cards Placed Under Three |
The Artificial LandscapeProcure a box, as in Fig. 12, of about a foot long, eight inches wide, and six inches high, or any other dimensions you please, so they do not greatly vary from these proportions. At each of its opposite ends, on the inside of this box, place a piece of looking-glass that shall exactly fit: but at that end where the sight hole A is, scrape the quicksilver off the glass, through which the eye can view the objects. Cover the box with gauze, over which place a piece of transparent glass, which is to be well fastened in. Let there be two grooves at each of the places C D E F, to receive two printed scenes, as follow: On two pieces of pasteboard, let there be skilfully painted, on both sides, any subject you think proper, as woods, bowers, gardens, houses, &c.; and on two other boards, the same subjects on one side only, and cut out all the white parts: observe also, that there ought to be in one of them some object relative to the subject, placed at A, that the mirror placed at B may not reflect the hole on the opposite side. The boards painted on both sides are to slide in the grooves C D E F, and those painted on one side are to be placed against the opposite mirrors A and B; then cover the box with its transparent top. This box should be placed in a strong light, to have a good effect. When it is viewed through the sight hole, it will present an unlimited prospect of rural scenery, gradually losing itself in obscurity; and be found well worth the pains bestowed on its construction. Next: To Draw Easily And Correctly A Landscape Or Any Other Object Previous: There Must Also Be A Glass Planned To Rise Up And Down In The Groove A B And So Managed By A Cord And Pulley C D E F That It May
Viewed 118 |
||||||||||||||||||||