SHA] ( 120 ) 



Semi-portable Engines.- Engines of the locomotive or portable 



type, but without road wheels for transporting them from 



place to place. 

 Sequoia or Californian Redwood (Sequoia sempervirens). See 



" Calif ornian Redwood." 

 Serayah. A 'Borneo timber resembling mahogany, strong, tough 



and easily worked. 

 Serrated (or Toothed). From the Latin serra, a saw ; a term 



in various forms that enters the technological field of Botany, 



as descriptive of leaf forms that clothe certain plants and 



trees. 

 Set. The deflection of the teeth of saws which causes the saw 



to cut a kerf wider than the thickness of the blade. See 



" Set and Setting." 



Set and Setting. The word "set" is used in various connections, 

 as (1 ) " To set " or place a house- wall, etc. ; (2) " to set up " 

 in business; (3) "to plant," as a shrub or tree; (4) "to 

 set straight " or in " decent order " ; (5) " to fix," as " to 

 set a machine, a door-frame, step, stone, or brick " ; (6) 

 "a set-time" for completing a contract; (7) "number," 

 as " a set of carving tools " ; (8) " to set a fine edge " on 

 cutting or shaving tools ; (9) a tool, a " saw-set " ; (10) 

 to "set-straight," to hammer out a bend, etc.; (11) in 

 navigation, "to set the compass"; (12) "set-off" (which 

 see) ; (1 3) " setting a saw " (which see) (14) in architecture, 

 the equality of hardening in plaster or cement ; (15) " setting- 

 coat " (ivhich see). The term " set," like " Joseph's coat," 

 has many colours. 



Set Gauge. A tool used by a cross-cut saw filer to regulate the 

 amount of set given to each tooth. 



Set-off. The part of a wall, etc., which is exposed horizontally 

 when a portion above it is reduced in thickness ; its variant 

 name is "off-set." In a legal sense '' set-off " represents 

 a counterclaim. 



Setting a Saw.- The process of bending saw teeth alternately 

 to the right and left, to give clearance to the sawdust or 

 to cause the saw to run cool and free. See ' ' Set and Setting. ' ' 



Setting-coat. The third or finishing coat of " three-coat plaster- 

 work," otherwise called the " skimming " (which see). 



Shaft. (1) The body of a column or pillar; the part between 

 the capital and base ; " a shaft," from the instance of an 

 arrow shaft, is understood to be light in character, hence 

 they may, as in Gothic architecture, be attached, detached, 

 or clustered ; (2) a wooden handle of a hammer, spade or 

 other tool ; (3) the " shafts " of a cart, wagon or carriage ; 

 (4) " iron shaft " of an engine, or for conveying power. 



