Where very low temperatures are obtained by using paramagnetic salts with magnets.



Related Terms

CRYOMETER

A thermometer for measuring low temperatures.

ASHCROFT SYSTEM

Timber boat building technique using two layers of overlapping diagonal strip planks with glue barrier between. High strength and low weight.

TROPIC LOWER LOW WATER

The lower low water of tropic tides.

ATTIC VENTILATOR

A mechanical fan located in the attic space of a residence; usually moves large quantities of air at a relatively low velocity.

NEW RIDGE

A newly formed ice ridge with sharp peaks, the slope of the sides usually being about 40°. Fragments are visible from the air at low altitude.

LUNITIDAL INTERVAL

The interval between the moon’s transit (upper or lower) over the local or Greenwich meridian and the following high or low water. The average of all high water intervals for all phases of the moon is known as mean high water lunitidal interval and is abbreviated to high water interval. Similarly the mean low water lunitidal interval is abbreviated to low water interval. The interval is described as local or Greenwich according to whether the reference is to the transit over the local or Greenwich meridian. When not otherwise specified, the reference is assumed to be local. When there is considerable diurnal inequality in the tide separate intervals may be obtained for the higher high waters, the lower high waters, the higher low waters and the lower low waters. These are designated respectively as higher high water interval, lower high water interval higher low water interval, and lower low water interval. In such cases, and also when the tide is diurnal, it is necessary to distinguish between the upper and lower transit of the moon with ref- erence to its declination.

A.L.A.R.P.

As low as reasonably practical.

MID-EXTREME TIDE

An elevation midway between the extreme high water and the extreme low water occurring in any locality.

SANTANNA

A plain with low vegetation, especially in the sub-tropical latitudes.

R-22

A refrigerant gas whose full name is monochlorodifluoromethane. Colorless, odorless, and non-flammable. It has a relatively low toxicity with a TLV of 1000 ppm. It is used on gas carriers and also on other vessels and applications where cooling and refrigeration are required, i.e. air conditioners, cargo refrigeration units etc..

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