Page:Popular Science Monthly Volume 89.djvu/938

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��Popular Scieticc Moullili/

��A Toy Bank of Wood Fastened Together Without Nails

how a toy bank and fastened together

��THF-: ilhislrations which is fitted c

��Making a Wood-Burning for the Home

>hows

��Heater

��''r^HK drawing below X house heating where wood

���The wood pieces forming the parts of the chair slip together without nails like a puzzle

��by checking and notching the several parts. The back of the chair is cut from a piece of wood 5 in. long by 2^4, i'l- wide and i $ in. thick. The sides are 7J^ in. long, '^ut from a 3/^-'n- board, 14 in- thick. iiach of these pieces is grooved for the back and cross-grooved for the top and bottom part of the box. The outline of these pieces \i shown in the illustration. The width of the part that receives the front and back is 234 '"• wide. The front and the bottom parts are shown at the right and left in the illustration, and are 3 in. long by 2}/2 in. wide. Each is cut from 3 -i ■in- board, which is left full thickness at the ends; but in the center across the trhole breadth it is reduced to }'§ in. thick for a length of 2^4 in- The seat of the chair is cut and checked the same way and to the same size and has the addition of the coin slot. The bottom which is shown in the center, is 3-^1 in. long by 23-4 i"- tluck. This is cut with a wide end to form ilu' step for the chair.

Put the i)arts together 1)\' placing the sides in position with the Ijack piece keci)ing them apart. Slip the seat in place, then the front i)iece, and lastly the bottom pieci-, which is the key to the complete mone\- box. Add the upper back, which slides in between the groo\es cut in the siiles of the chair. 'l"he coins are inserted through the seat and are taken out fnjm the bottom. John \ . iJiNtoi'.

��i system of is the only a\-ailaljle fuel. The tempera- ture in the locality where this is in use frequently reaches 40 deg. below zero. The house is never cold in any room on either of the two floors, and the thermometer stands at 60 to 70 deg. in the morning after the coldest nights.

An ordinary box stove for 4 ft. cord wood is built into a rectangular jacket with walls 8 in. thick. An air- space of 8 in. separates the concrete from the stove at the nearest points. The top of the wall is recessed so as to \vd\e a 4-in. shelf to support the galvanized sheet- steel roof. This steel top has sleeves for the smoke-pipe and heat Hues, and is supported by two iron bars, equally spaced between the ends. The front of the stove is built in flush with the concrete, allowing access to fire and ash-doors. The expansion of the stove is provided for where it passes through the

���n

����A concrete

covering for an or-. '■ '

dinary box stove ,-■''

concrete, by a 3 2-in. jacket of asbestos which prevents actual contact between the sto\e and the concrete. About 3 in. of sand or loam is placed on top of the sheet nutal. The heal lines at the lop are con- nciled with those miming lo the registers in ihedilTerenl rooms. — 1. A. Norton.

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