[13] I. e., at the fourth square from the right angle.
[14] This is done easily enough, but the following directions may not be needless for some. Draw a straight line for a base of any length. If you wish to form a equilateral triangle, i. e. one of which the three sides are equal, divide this base line by two, and at the point of division set up an upright line; then from each end of the base line slant against the central upright line one the length of the base. These, of course, will meet at the top, and the triangle is formed. Any other triangle may be formed in a similar manner, the length of the sides being at the choice of the artist.
[15] Be sure and have the number you name greater than that of the first position of the card in the pack; for instance, twenty-four is greater than thirteen.
Transcriber notes:
p. [vi]. 'Cumbustion without Flame,' changed 'Cumbustion' to 'Combustion'.
P. [18]. 'diaphonous' changed to 'diaphanous' as in 'diaphanous bodies'.
P. [29]. 'here it' changed to 'here is'.
P. [32]. 'the stall' changed to 'the stalk.'.
P. [38]. 'the performed', changed 'performed' to 'performer'.
P. [61]. 'Several t icks', should read 'Several tricks', fixed.
P. [74]. 'convinience' changed to 'convenience'.
P. [76]. 'supicion' changed to 'suspicion'.
P. [93]. 'the smooth', changed 'the' to 'them'.
P. [94]. 'sacer' changed to 'saucer'.
P. [101]. 'appearence' changed to 'appearance'.
P. [103]. 'lines will will', changed to 'lines will'.
P. [105]. 'salt of strontian', changed 'strontian' to 'strontium'.
P. [105]. 'will loose', changed 'loose' to 'lose'.
P. [122]. 'seperated' changed to 'separated'.
P. [130]. 'ja' changed to 'jar'.
P. [141]. 'the crd, aon' changed to 'the crd, on'.
P. [142]. 'thst the' changed to 'that the'.
P. [160]. 'these are are' changed to 'these are'.
P. [167]. 'sprinke some powdered camphor', changed 'sprinke' to sprinkle'.
P. [169]. 'preduce similar effects', changed 'preduce' to 'produce'.
P. [175]. Fig. 2 'REFRACTING STERESCOPE' changed to 'REFRACTING STEREOSCOPE'.
P. [192]. 'blow throw the quill' changed 'throw' to 'through'.
P. [195]. 'calcuated' changed to 'calculated'.
P. [196]. 'abou' chanaged to 'about'.
P. [198]. 'phemomena of nature.', changed 'phemomena' to 'phenomena'.
P. [201]. 'perpindicular' changed to 'perpendicular'.
P. [210]. 'half of tha triple', changed 'tha' to 'that'.
P. [214]. 'a little scrunity' changed 'scrunity' to 'scrutiny'.
P. [216]. 'in successsion' changed to 'in succession'.
P. [225]. 'proceded' changed to 'proceeded'.
P. [253]. Added two missing em dashes to answers.
P. [254]. 'put suppose the', changed 'put' to 'but'.
P. [255]. 'put prior', changed 'put' to 'but'.
P. [284]. 'when you clearl', changed 'clearl' to 'clearly'.
P. [288]. '[48]. A MAZE OR LABRYINTH.'; changed 'LABRYINTH' to 'LABYRINTH'.
P. [303]. 'line us the basis', changed 'us' to 'as'.
P. [305]. 'will readly', changed 'readly' to 'readily'.
P. [306]. 'the forms therto)', changed 'therto' to 'thereto'.
P. [307]. 'Fig 10, 11, 12, 13, 14, 15,', changed 'Fig' to 'Figs.'
P. [307]. 'With this uplex', changed 'uplex' to 'duplex'.
P. [307]. 'several direetions', changed 'direetions' to 'directions'.
P. [316]. 'illustrations o', changed 'o' to 'of'.
P. [317]. 'In desigining' changed 'desigining' to 'designing'.
P. [320]. 'first (Fig.', changed to 'first (Fig. 54)'.
P. [349]. 'and unlimited' changed to 'an unlimited'.
P. [351]. 'the flottom' changed to 'the bottom'.
P. [353]. 'beng reflected' changed to 'being reflected'.
P. [353]. 'mithltiplied' changed to 'multiplied'.
Add: Inquire Within... 'populur' changed to 'popular'. Changed 'fradulent' to 'fraudulent'.
Add: 'The Reason Why:' changed 'lightining' to 'lightning'.
Add: 'Live and Learn;' changed 'recommonded' to 'recommend'.
Add: 'Amusements of Home,' changed 'pastime' to 'pastimes'. Add: 'PARLOR THEATRICALS' changed 'everthing' to 'everything'.
Add: 'Chesterfield's Art of Letter-writing' changed 'Busines' to 'Business'.
Fixed various punctuation.