A descriptive and historical account of hydraulic and other machines for raising water (1842)
Ewbank, Thomas · Tilt & Bogue · leaf 404
se , & c . & c . Now it so happens that these very things were done and by means of air and vapor . The annexed figure , from Problem XI , of the Spiritalia , will serve as a specimen of the ingenuity of the ancients in these respects . It is merely one of a number that Heron has given . The altar… … of vapor ; büt the figure represents Liquida rai ' sed by heat in ancient al tars — ' from - the Spiritalia . only one of the nümerous modifica - tions employed . It is obvious from this and some other devices described by Heron , ( as No . 173 ) that vapor from the contained liquids contributed…
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