usual upright of aright-angled triangle. The base of this triangular known as the general laboratory, the second the bio- tubes connected with upper and lower horizontal cir- bracket carries a steel loop which supports. the folded logical laboratory, and the third the chemical labora-… … THE MARTIN RADIATOR VALVE. THE LADDER FOLDED &ND LAUNCHED. the customary construction, but will pass through the valve-casing and back to the boiler, thereby obviating the back pressure usually caused by cutting off the reinforce the loop, and to hold it in substantially hori- tories are equipped…
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