Exodus 30:2

“A cubit shall be the length thereof, and a cubit the breadth thereof, four square shall it be, etc.] It was one Jewish square cubit, which is in surface, according to Bishop Cumberland, three English square feet, and about forty seven square inches; which may denote the solidity, perfection, and extensiveness of Christ’s priesthood, it being unchangeable, firm, and lasting; and which passes not from one to another, and the which makes something perfect, which the law and priesthood of Aaron could not, even perfects for ever them that are sanctified; and is very extensive; the virtue of it reaches to all the elect of God, from the beginning of the world to the end of it; not his sacrifice…”

“foursquare--the meaning of which is not that it was to be entirely of a cubical form, but that upon its upper and under surface, it showed four equal sides. It was twice as high as it was broad, being twenty-one inches broad and three feet six inches high. It had "horns"; its top or flat surface was surmounted by an ornamental ledge or rim, called a crown, and it was furnished at the sides with rings for carriage. Its only accompanying piece of furniture was a golden censer or pan, in which the incense was set fire to upon the altar. Hence it was called the altar of incense, or the "golden altar" [Exo 39:38; Exo 40:26], from the profuse degree in which it was gilded or overlaid with the…”

“Exodus 37:25-28; Exodus 40:26-27. The altar of incense was to be a casing of boards of shittim wood Exodus 25:5, Exodus 25:18 inches square and three feet in height (taking the cubit as 18 inches), entirely covered with plates of gold. Four “horns” were to project upward at the corners like those of the altar of burnt-offering Exodus 27:2. A crown or moulding of gold was to run round the top. On each of two opposite sides there was to be a gold ring through which the staves were to be put when it was moved from place to place. Exodus 30:4 By the two corners thereof - Not corners. See the margin. The sense appears to be: And two gold rings shalt thou make for it under its moulding; on its two…”

“the horns: Exo 27:2 Exodus 30:3”