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Often after she was sleeping, and long before she awoke in the morning, he was at work carry-ing heaped trays from the evaporator to the store-room, and tying the roots, leaves, bark, and seeds into packages. While he gathered trillium roots the Girl made drawings of the plant and learned its commercial value.
To pitch my tent would have been impossible, owing to the wind and the suddenness of its appearance. In thirty minutes or less it is all over; the sun shines out warmly and dissipates the clouds, and converts the ground into an evaporator that envelops everything in steam. In an hour after it quits raining, the road is dry again, and across the plain it is for the most part excellent wheeling.
The ebullition of the first evaporator, then, is kept up not only by the exhaust from the motive cylinder, but also by the steam from the juice itself, which has been rendered fit to serve as a heating steam by the pressure that it has undergone in the compressing cylinder.
As for the running of the apparatus, that was perfectly regular, and the deviations in temperature in each evaporater were scarcely two or three degrees. The following are the mean temperatures: First evaporator: heating steam 110 deg. C.; juice steam 100 deg. C. Second evaporator: juice steam 83 deg. C. Third evaporator: juice steam 62 deg.
Of course! Nature is always right. Just two inches high and it's harvest for you. I can use a rake, and dried in the evaporator you bring me ten cents a pound; to the folks needing a tonic you are worth a small fortune. No doubt you cost that by the time you reach them; but I fear I can't gather you just now. My head is a little preoccupied these days.
I raise most of my plants, bushes, and herbs. I gather exactly in season, wash carefully if water dare be used, clean them otherwise if not, and dry them by a hot air system in an evaporator I built purposely. Each package I put up is pure stuff, clean, properly dried, and fresh.
We have then the steam fire-engine; compressed air which he early employed in England, and which has become an instrument of enormous importance in connection with the industrial progress of the age, although this is in no especial degree due to his efforts; the surface condenser, distiller, and evaporator are a permanently and absolutely essential part of modern marine practice; the screw-propeller has almost sole possession of the field of marine propulsion; modern marine engines and boilers in naval practice are always placed below the water-line and are protected by deflective deck armor and frequently by coal as well; the turret has become a permanent and accepted part of the practice of the age, while the monitor type in its essential feature seems to be evanescent.
In your opinion, would the planting of ten acres in berries for drying be a success? The blackberries chiefly grown in California are the Lawton, Crandall and the Mammoth. The raspberry chiefly grown is the Cuthbert. There are very few of these berries dried. It would be better to dry them in an evaporator than in the sun, but little of it is done in this State.
This plan localizes the trouble of deposit, and frees it from its dangerous character, because an evaporator cannot become overheated like a boiler, even though it be neglected until it salts up solid; and if the same precautions are taken in working the evaporator which used to be adopted with low pressure boilers when they were fed with salt water, no serious trouble should result.
Of these a few of the more important may be mentioned, such as the surface condenser, distiller, and evaporator, forced draft for combustion, placing machinery of warships below the water-line, and their protection by coal, ventilation by fan-blowers, together with a vast variety of items involved in the conception and design of the "Monitor" as a whole, and in his other naval designs.
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