CHAPMAN £- HALL, LLMITED. 29 



SOLID :\IODEI,S, ^c— Continued. 



* Davidson's Advanced Drawing Models, £g. — The following is a brief description 

 of the Models : — An Obelisk — composed of 2 Octagonal Slabs, 26 and 20 inches 

 across, and each 3 inches high ; i Cube, 12 inches edge ; i Monolith (forming 

 the body of the obelisk) 3 feet high ; i Pyramid, 6 inches base ; the complete 

 object is thus nearly 5 feet high, A Market Cross— composed of 3 Slabs, 24, 18, 

 and 12 inches across, and each 3 inches high ; i Upright, 3 feet high ; 2 Cross Arms, 

 united by mortise and tenon joints ; complete height, 3 feet 9 inches. A Step- 

 Ladder, 23 inches high. A Kitchen Table, 1432 inches high. A Chair to corre- 

 spond. A Four-legged Stool, with projecting top and cross rails, height 14 inches. 

 A Tub, with handles and projecting hoops, and the divisions between the staves 

 plainly marked. A strong Trestle, 18 inches high. A Hollow Cylinder, g inches 

 in diameter, and 12 inches long, divided lengthwise. A Hollow Sphere, 9 inches 

 in diameter, divided into semi-spheres, one of which is again divided into quarters ; 

 the semi-sphere, when placed on the cylinder, gives the form and principles of 

 shading a dome, whilst one of the quarters placed on half the cylinder forms a 

 niche. 



^Davidson's Apparatus for Teaching Practical Geometry (22 models), £^. 



"Binn's Models for Illustrating the Elementary Principles of Orthographic Projection as 

 applied to Mechanical Drawing, in box, £1 los. 



Miller's Class Drawing Models. — These Models are particularly adapted for teaching 

 large classes ; the stand is very strong, and the universal joint will hold the 

 Models in any position. IVood Models: Square Prism, 12 inches side, 18 inches 

 high; He.xagonal Prism, 14 inches side, j8 inches high; Cube, 14 inches side: 

 Cylinder, 13 inches diameter, iii inches high ; Hexagon Pyramid, 14 inches 

 diameter, 22% inches side ; Square Pyramid, 14 inches side, 22^2 inches side : 

 Cone, 13 inches diameter, 22J4 inches side ; Skeleton Cube, 19 inches solid wood 

 i^ inch square ; Intersecting Circles, ig inches solid wood 1% by t% inches. 

 JVi're Models : Triangular Prism, 17 inches side, 22 inches high ; Square Prism, 

 14 inches side, 20 inches high ; He.\agonal Prism, 16 inches diameter, 21 inches 

 high ; Cylinder, 14 inches diameter, 21 inches high ; He.xagon Pyramid, 18 inches 

 diameter, 24 inches high ; Square Pyramid, 17 inches side, 24 inches high ; Cone, 

 17 inches side, 24 inches high ; Skeleton Cube, ig inches side; Intersecting Circles, 

 19 inches side ; Plain Circle, ig inches side ; Plain Square, ig inches side. Table, 

 27 inches by 21% inches. Stand. The set complete, .^14 13s. 

 Vulcanite Set Square, 5s. 

 Large Compasses, with chalk-holder, ss. 



*Slip, two set squares and X square, ss. 



*Parkes's Case of Instruments, containing 6-inch compasses with pen and pencil leg, 53. 



*Prize Instrument Case, with 6-inch compasses pen and pencil leg, 2 small compasses, 

 pen and scale, i3s. 

 6-inch Compasses, with shifting pen and point, 4s. 6d. 



LARGE DIAGRAMS. 



ASTRONOMICAL : 



TWELVE SHEETS. By Johm Drew, Ph. Dr., F.R.S.A. Prepared for the Com- 

 mittee of Council on Education. Sheets, £2 8s.; on rollers and varnished, £\ 4s. 



BOTANICAL : 



NINE SHEETS. Illustrating a Practical Method of Teaching Botany. By Professor 

 Henslow. F.L.S. £2; on rollers and varnished, .^^3 3s. 



Dicotyledon . . 

 Monocotyledons 

 * Models, &c., entered as sets, can only be supplied In sets. 



