Briggs had himself been engaged in filling up the gap, and in a lettex to John Pell, written after the publication of Vlacq's work, and dated October 25, 1628, he says: " My desire was to have those chiliades that are wantinge betwixt 20 and 90 calculated and printed, and I had done them all almost by my selfe, and by some frendes whom my rules had sufficiently informed, and by agreement the busines was conveniently parted 'amongst us; but I am eased of that charge and care by one Adrian Vlacque, an Hollander, who hathe done all the whole hundred chiliades and printed them in Latin, Dutche and Frenche, moo bookes in these 3 languages, and hathe sould them almost all.
The form he recommends for the needle is that of "a true circle, having his Axis going out beyond the circle, at each end narrow and narrower, unto a reasonable sharpe point, and being pure steele as the circle it selfe is, having in the middest a convenient receptacle to place the capitell in."
Of Mechanical Refrigeration (Chicago); Redwood, Theoretical and Practical Ammonia Refrigeration (New York); Stephansky, Practical Running of an Ice and Refrigerating Plant (Boston); Ledoux, Ice-Making Machines (New York); Wallis-Taylor, Refrigerating and Ice-Making Machines (London) Ritchie Leask, Refrigerating Machinery (London); De Volson Wood, Thermodynamics, Heat Motors and Refrigerating Machinery (New York); Linde, Kdlteerzeugungsmaschine Lexikon der gesamten Technik; Behrend, Eis and KdlteerzeugungsMaschinen (Halle); De Marchena, Kompressions Kdltemaschinen (Halle); Theodore Koller, Die Kdlteindustrie (Vienna); Voorhees, Indicating the Refrigerating Machine (Chicago); Norman Selfe, Machinery for Refrigeration (Chicago); Hans Lorenz, Modern Refrigerating Machinery (London); Lehnert, Moderne Kdltetechnik (Leipzig); L.
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