## Most Viewed- Never-yielding Cement- Aigrettes - Composition I Saltpetre Two Ounces Flour Of Sulphur One Ounce - The Three Magical Parties - Chemical Illuminations - The Deforming Mirrors - A Water Which Gives Silver A Gold Colour - Bottles Broken By Air - Of Gunpowder &c - A Liquid That Shines In The Dark - Invisible Ink - Another - A Lamp That Will Burn Twelve Months Without Replenishing - A More Powerful Fulminating Powder - Another Way - Inflammable Phosphorus - Another Way ## Least Viewed- The Leech A Prognosticator Of The Weather- To Make Squibs And Serpents - To Give Silver-plate A Lustre - To Show The Spots In The Sun's Disk By Its Image In The Camera - To Load Air Balloons With Stars Serpents &c &c When You Fill - To Find The Number Of Changes That May Be Rung On Twelve Bells - To Tell The Number Of Points On Three Cards Placed Under Three - To Find The Difference Between Two Numbers The Greatest Of Which Is - To Fill A Bladder With Hydrogen Gas - To Make Any Number Divisible By Nine By Adding A Figure To It - To Represent Cascades Of Fire - To Make Several Rockets Rise Together Take Six Or Any Number Of - To Melt Iron In A Moment And Make It Run Into Drops - The Unconscious Incendiary - 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 - To Extract The Silver Out Of A Ring That Is Thick Gilded So That The - The Power Of Water When Reduced To Vapour By Heat |
## To Tell Any Number A Person Has Fixed On Without Asking Him AnyQuestions. You tell the person to choose any number from 1 to 15; he is to add 1 to that number, and triple the amount. Then, 1. He is to take the half of that triple, and triple that half. 2. To take the half of the last triple, and triple that half. 3. To take the half of the last triple. 4. To take the half of that half. Thus, it will be seen, there are four cases where the half is to be taken; the three first are denoted by one of the eight following Latin words, each word being composed of three syllables; and those that contain the letter i refer to those cases where the half cannot be taken without a fraction; therefore, in those cases, the person who makes the deduction is to add 1 to the number divided. The fourth case shows which of the two numbers annexed to every word has been chosen; for if the fourth half can be taken without adding 1, the number chosen is in the first column; but if not, it is in the second. The words. The numbers they denote. Mi-se-ris 8 0 Ob-tin-git 1 9 Ni-mi-um 2 19 No-ta-ri 3 11 In-fer-nos 4 12 Or-di-nes 13 5 Ti-mi-di 6 14 Te-ne-ant 15 7 For example: Suppose the number chosen is 9 To which is to be added 1 ---- 10 The triple of that number is 30 The half of which is 15 The triple of that half must be 45 And the half of that[A] 23 The triple half of that half 69 The half of that[A] 35 And the half of that half[A] 18 [A] At all these stages, 1 must be added, to take the half without a fraction. While the person is performing the operation, you remark, that at the second and third stages he is obliged to add 1; and, consequently, that the word ob-tin-git, in the second and third syllables of which is an i, denotes that the number must be either 1 or 9; and, by observing that he cannot take the last half without adding 1, you know that it must be the number in the second column. If he makes no addition at any one of the four stages, the number he chose must be 15, as that is the only number that has not a fraction at either of the divisions. Next: The Lamp Chronometer Previous: To Tell A Person Any Number He May Privately Fix On
Viewed 1524 |