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Contents of Appendix

FAGE A PERSON having an even Number of Counters in one Hand, and an odd Number in the other, to tell in which Hand each of them is.. 848 A Person having fixed on a Number in his Mind, to tell him what Number it is Another Method of discovering a Number thought on.... 849 .... 849 To tell the Number a Person has fixed upon, without asking him any Questions... 849 A curious Recreation-The Blind Abbess and her Nuns 851 Any Number being named, add a Figure, which shall make it divisible by 9 851 A Person having made choice of several Numbers, to tell him what Number will exactly divide the Sum of those which he has chosen.. 852 To find the Difference between any two Numbers, the greater of which is unknown.... 852 A Person striking a Figure out of the Sum of two given Numbers, to tell him what that Figure was..... 853 By knowing the last Figure of the Product of two Numbers, to tell the other Figures.. 853 A curious Recreation with a Hundred Numbers, usually called the Magical Century .... 854 A Person in Company having privately put a Ring on one of his fingers, to Name the Person, the Hand, the Finger, and the Joint on which it is placed....... ..

To make a Deaf Man hear 855 856 When two Chests are like one another, and of equal Weight, being filled with different Metals, to distinguish the one from the other.. 856 To find the Burden of a Ship at Sea or in a River.. 857 To Measure the Depth of the Sea...... 857 Method of Melting Steel, and causing it to Liquefy. 858 How to dispose two little Figures, so that one shall light a Candle and the other put it out 858 ..

The Camera Obscura, or Dark Chamber... 858 To show the Spots in the Sun's Disc. 860 ...

To magnify small Objects by means of the Sun's Rays. 860 To cut a Looking-glass or Crystal without the help of a Diamond By the means of two plain Looking-glasses, to make a Face appear under different 861 forms 861 To know which of two different Waters is the lightest, without any Scales.... 862 To know if a suspicious Picce of Money is good or bad 862 ... ...