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
- Vegetable Air-bubbles
- 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 Card In The Opera Glass
- To Make Pictures Of Birds With Their Natural Feathers
- Winter Changed To Spring
- The Boundless Prospect
- The Electric Aurora Borealis
- To Tell The Number Of Points On Three Cards Placed Under Three
- How To Make The Pass Hold The Pack Of Cards In Your Right Hand So
- The Divining Card
- Visible Now You Will Observe That By Altering The A In The Word Law Into D And Adding O Before The L And Oman After The W It Bec
- The Transposable Pieces
- To Show The Pressure Of The Atmosphere

To Make Any Number Divisible By Nine By Adding A Figure To It

If (for example) the number named be 72,857, you tell the person who
names it to place the number 7 between any two figures of that sum,
and it will be divisible by 9; for if any number be multiplied by 9,
the sum of the figures of the product will be either 9, or a number
divisible by 9.





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Previous: The Iron Tree

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