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.