13 hitch pins 20 are inserted through holes in slip pins 9 to hold the cords in position bin 1 may also have an insulating blanket 23 which covers the composting matter within bin i as shown in fig4 in use bin 1 is filled with compost matter 18 which consists of a mixture of high and low nitrogen materials see fig4 this mixture is premoistened to the wetness of a wrung out sponge the compost matter is shoveled or forked into bin i after about two inches of compost matter 18 have been placed in bin 1 an air tube 7 is laid across the matter so that each end of _air tube 7 communicates with an opening 6 thereby to establish an air flow path through the tube eight to ten inches of compost matter 18 is then piled on top of air tube 7 lastly a thin layer about one inch of topsoil 19 is put on the top of the compost matter 18 subsequently the foregoing process is repeated starting with another two inch layer of the compost matter 18 a second air pipe 7 is then horizontally placed across bin 1 with the ends in openings 6 followed by eight to ten inches of compost matter 18 and a layer of top soil this process continues until all compost matter 18 has been placed in bin 1 insulating blanket 23 is then laid over compost matter 18 and lid 11 is secured onto top opening 2 with securing cords 15 after matter 18 has been completely composted and the composted material is ready to be removed hitch pins 20 are pulled out of slip pin 9 thereby allowing securing cords to be.