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 A tool is but the extension of a man's hand, and a machine is but 
a complex tool. And read more 
 A tool is but the extension of a man's hand, and a machine is but 
a complex tool. And he that invents a machine augments the power 
of a man and the well-being of mankind. 
 She has a housewife's hand; but that's no matter:
 I say she never did invent this letter;
  read more 
 She has a housewife's hand; but that's no matter:
 I say she never did invent this letter;
  This is a man's invention and his hand. 
 Discovery consists of seeing what everybody has seen and thinking 
what nobody else has thought.  
 Discovery consists of seeing what everybody has seen and thinking 
what nobody else has thought. 
 The golden hour of invention must terminate like other hours, and 
when the man of genius returns to the read more 
 The golden hour of invention must terminate like other hours, and 
when the man of genius returns to the cares, the duties, the 
vexations, and the amusements of life, his companions behold him 
as one of themselves--the creature of habits and infirmities. 
Everything that can be invented has been invented.
Everything that can be invented has been invented.
Want, the mistress of invention.
Want, the mistress of invention.
 He had been eight years upon a project for extracting sunbeams 
out of cucumbers, which were to be put read more 
 He had been eight years upon a project for extracting sunbeams 
out of cucumbers, which were to be put in phials hermetically 
sealed, and let out to warm the air in raw, inclement summers. 
 It is not true, it is a happy invention.
 [It., Se non e vere e ben trovato.]  
 It is not true, it is a happy invention.
 [It., Se non e vere e ben trovato.] 
A moment's insight is sometimes worth a life's experience.
A moment's insight is sometimes worth a life's experience.