Each guide consists of the metal holder, a wooden guide and two bolts. The holder, wood guide and the lower bolt are shown in the detail drawings. It should be noted that the bolts are provided with two nuts so as to lock onto the wood guide and prevent the guide from clamping to the posts and prevent free movement up and down. It should also be noted in the drawing of the lower bolt that a hole is bored through the bolt near the end and thus a means provided for attaching the lower ends of the springs.

A wooden brace is fastened to the outside of the posts at top with two 2" No. 10 flat head wood screws. A screw eye is fastened to the under side of each brace and thus a means provided for fastening the upper ends of the springs.

The metal parts of the holder may be bent to the desired shape by holding them in a metal vise and using a wrench.

Ten d nails are used to hold the bag. They are cut 34" long and filed to shape and the point bent up while held in the vise. Holes are drilled through the holders of the same size as the nails and they are held in place by driving the center punch in at the point while the nail comes through the metal. As shown in the detail drawing A is fastened to B with a rivet. It is fastened at an angle so as to hold the bag at a slant at top and thus facilitate shoveling.

The following is the bill of material for the bag holder.

24" x 14" carriage bolts to fasten angle iron to post and platform.

24" x 22" machine bolts with two nuts each for guides at bottom.

24" x 2" machine bolts with two nuts each for guides at top.

4 2" No. 10 flat head wood screws to fasten braces to posts.

2 pieces of iron %" x 4" x 17" upright members of the bag holder.

2 pieces of iron " x 4" x 7" for horizontal members of the bag holder.

24" x 5" iron rivets to assemble bag holder.
4 10d common nails to make the bag holder.
DIE STOCK.

R. E. Dahlgren, Machine Shop Instructor, Racine Conuation School, Racine, Wis.

Some time ago my shop, in an emergency, had to use a die for which we had no holder. The accompanying drawing is the design which has been evolved from what was then a make shift die stock. It makes a fine tool which goes especially well with a similar tap wrench, illustrated in the "Industrial Arts Magazine" some months back.

The only part of the stock that may cause any exceptional trouble is the head. In making this, I would suggest, the facing and boring of the head first, then the periphery and the other side can be machined, either by chucking the stock from the inside, or what may prove the more satisfactory, by using a stepped arbor. Now how well the rest of the work may have been done, it can be spoiled by drilling the holes, for the handles, crooked. This can be guarded against by using tool makers' methods in laying out and drilling the holes in the drill press. A slower but a very satisfactory method which can be used is to mount the job on an arbor and do the drilling in the milling machine. At this time the

There is more or less dust caused by sweeping and cleaning in every small shop. And even where finishing rooms are provided it is quite convenient to have some place to store small articles while the finish is drying.

Other teachers are having the same difficulty as I did in keeping painted toys away from the settling dust. I have gained this information from letters received from teachers asking what kind of a scheme I used to take care of painted toys while they were drying.

This finishing cabinet serves for many purposes in my shop. It is used as a glue table, stain and paint bench, a place on which to make large layouts, and as a place where small soldering jobs are done.

This drawing does not detail every part because it is not necessary to make a cabinet exactly like this one. No doubt some dimensions will have to be changed to allow the cabinet to fit a certain space in another shop.

Any kind of material is suitable as the cabinet can be stained or painted. The top, shelves, and frames are made of wood but the panels in the doors are beaver or wall board.

The top is covered with galvanized iron. This is ideal for gluing or painting and it offers a suitable protection for the gas heater. A strong solution of gold dust, hot water and turpentine may be used for cleaning the top. The small cupboard at the end is equipped with an outfit for soldering. This is convenient as a bit of soldering is necessary now and then in the construc tion of toys.

A large door swings down on hinges fastened to the top of the cabinet and protects the shelves in the upper

part. The lower part may be closed by sliding doors that work between cleats forming slides. There is no back in the cabinet; it is built against the wall saving considerable material. Paints and brushes can be stored on one of the shelves in the lower part. A HANDY JIG.

J. S. Turner, Vocational Teacher, Centralia, Wash. As all know who have worked any in a carpenter shop, it is difficult to hold and put together a mitered The jig illustrated makes it as easy as an ordinary

corner.

Fig.1

Fig. 2

PICTURE FRAME JIG.

square corner and is useful when a number of pieces of the same size are to be joined.

The jig is cut out of a piece of wood as shown in Figure 1 and is indented the exact length of one side of the frame. In figure 1, (a) is the jig and (b) is one side of the frame in place. Figure 2 shows the complete arrangement, with screw clamps in place.

It will be noted that the notch in the jig is only about one-half as deep as the width of the material to be put together and allows for nailing as shown at (c). A CROCHET-BALL HOLDER.

E. C. Powell, Massillon, Ohio.

The crochet-ball holder can be turned with good results in cherry, walnut, gum, poplar or chestnut. It is designed to hold a crochet-ball in such a manner that

MAKING WIRELESS SETS AND LEARNING TO OPERATE THEM KEEP BOYS BUSY AT LANE TECHNICAL SCHOOL, CHICAGO.

Geo. F. Paul.

The keen interest in recent radio developments has brought about the formation of classes in this work at Lane Technical High School, Chicago, where the instruction has taken a practical form. In several of the shops and classrooms of the main Lane building boys will be found working on some piece of radio apparatus or receiving instruction in wireless operation. At the Sheldon branch of Lane many other boys are eagerly following up various features of Radio work, as they are anxious "to get into the game," as they say.

The work in the radio classes at Sheldon covers three phases of the radio art; namely, code practice, theory of construction and operation of radio apparatus and the actual construction of this apparatus. These classes are made up of boys who desire instruction in this new field of electricity in preference to the regular shop work, so the shop time is given to the radio work. The electrical course given covers two years.

The work at Sheldon is under the direction of Frederick C. Kulieke, who is a practical electrician. One of the things that he did early in the course was to draw up a table or list of all receiving apparatus, including a minimum list. This was done for two purposes: one, the study of theory; the other, the comparison of prices of purchased apparatus and that made by the boys themselves. From this list each boy decided upon the type of set of the individual pieces that he would construct. Several standard sets were designed and revision of these drawings is now in progress.

One aim in the work at Sheldon has been to have, as in the regular work, the boy make all the wood cabinets and wood parts while in his wood shop semester (the first) and then follow up with the electrical parts in his next semester.

One set, in which the material used is of a cheaper character, reaches the low figure of 85 cents, and is complete, ready for 'phones, ground lead and aerial lead. One of the things the boys are making is a lightning switch for 45 cents; a switch like this, if bought retail, would cost very close to four dollars. These sets may be elaborated on, and when they are so made up they rival many of the commercial sets in looks and operation, with a saving that is certainly worth considering. Besides, and this is the really big point about it all, there is a

LOOSE COUPLERS, TRANSFORMER MADE AT SHELDON BRANCH, LANE TECHNICAL HIGH SCHOOL, CHICAGO. ALSO KEY, VARIOMETER PARTS, CRYSTAL DETECTOR, LOOSE COUPLERS. remarkably high educational value in all of this work. The boys are attracted by the mystery that is attached to the subject. It gives them the much needed hobby that offers a vent for boy activities, especially in a crowded city. Just how great this interest is among the boys may be judged from the fact that within the last three months fifteen thousand feet of aerial wire has been purchased by the boys.

In the main building at Lane, two regular classes have been established to give the boys practical training in radio operation. Instruction boards are furnished; these have 'phones and keys attached. Through the use of one board six boys can receive instruction in learning the Morse international code. The instructor is Miss Elizabeth A. Bergner, who for some time has enjoyed the distinction of being the only licensed woman wireless operator in the city of Chicago. She has found it advantageous to group the boys according to the speed they show. For example, in one group may be boys that can copy five to ten words a minute; in a second group may be those who can copy ten to fifteen words a minute; while in a third group will be the faster boys. Classroom instruction is given in the theory of wireless. Discussions are also held covering the fundamental principles.

In one of the rooms of the electrical shop on the first floor is installed the wireless cage. This station, GDB, is in operation throughout the school day. Boys from Miss Bergner's classes are on duty. There is a regular operator and one assistant every period of the school day. The regular operator is a boy who has obtained his license.