or LOGISTICAL ARITHMETIC, a name sometimes employed for the arithmetic of sexagesimal fractions, used in astronomical computations.

The same term has been used for the rules of computations in algebra, and in other species of arithmetic; witness the logistics of Vieta and other writers.

Shakely, in his Tabula Britannica, has a table of logarithms adapted to sexagesimal fractions, and which he calls Logistical Logarithms; and the expeditious arithmetic obtained by means of them, he calls Logistical Arithmetic.

LYBAN LOTUS has been described (Encycl.) under the title Rhamnus; but the following additional particulars from Mr Park will be acceptable to our botanical readers:

The lotus is very common in all the countries which our author visited, and he had an opportunity to make a drawing of a branch in flower, of which an engraving is published in his travels, that with his permission we have copied (see Plate XXX.). The lotus produces fruit which the negroes call tomberongi. These are small farinaceous berries, of a yellow colour and delicious taste. They are much esteemed by the natives, who convert them into a sort of bread, by exposing them for some days to the sun, and afterwards pounding them gently in a wooden mortar, until the farinaceous part of the berry is separated from the stone. This meal is then mixed with a little water, and formed into cakes; which, when dried in the sun, resemble in colour and flavour the sweetest gingerbread. The stones are afterwards put into a vessel of water, and shaken about so as to separate the meal which may still adhere to them; this communicates a sweet and agreeable taste to the water, and with the addition of a little pounded millet, forms a pleasant gruel called jondi, which is the common breakfast in many parts of Lydumar, during the months of February and March. The fruit is collected by spreading a cloth upon the ground, and beating the branches with a stick. Our author thinks there can be little doubt of this being the lotus mentioned by Pliny, as the food of the Lybian Lotophagi. An army may very well have been fed with the bread made of the meal of the fruit, as is said by Pliny to have been done in Lybia; and as the taste of the bread is sweet and agreeable, it is not likely that the soldiers would complain of it.