. An introduction to the study of Gothic architecture . 2. Porcliester Castle, Masonry and Arch formed of Roman bricks or 3. Mint Wall, Masonry. 6 THE BARBARIAN PERIOD. part of whicli is cased with small ashlar-work ; and inthe Picts Wall in jSorthumberland, a great part ofwhich still remains. The actual construction of themass of the wall is usually concrete, or rubble facedwith cut stone, with layers of bricks or tiles. Eomanmortar may usually be distinguished by being mixedwith pounded brick, and in general by its extremehardness, being often more diff
. An introduction to the study of Gothic architecture . 2. Porcliester Castle, Masonry and Arch formed of Roman bricks or 3. Mint Wall, Masonry. 6 THE BARBARIAN PERIOD. part of whicli is cased with small ashlar-work ; and inthe Picts Wall in jSorthumberland, a great part ofwhich still remains. The actual construction of themass of the wall is usually concrete, or rubble facedwith cut stone, with layers of bricks or tiles. Eomanmortar may usually be distinguished by being mixedwith pounded brick, and in general by its extremehardness, being often more difficult to break than thetile or the stone itself. This hardness arises in partfrom the lime having always been burnt on the spot,and used hot and fresh, on which the strength of limegreatly depends. Occasional instances, howeyer, dooccur in which this has been neglected, and Komanmortar is reduced to powder as easily as any the other hand, instances also occur of medievalmortar being as hard as Eoman, and also in some fewcases mixed with pounded brick. Such occasional andrare exceptions do not interfere with the general Eom
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Keywords: ., bookcentury1800, bookdecade1870, bookidintroduction, bookyear1877
