Parallelogram of forces Apparatus : Consisting of a nicely  polished wooden board with 2 clamping pulleys and 3 sets of  iron C.P. slotted weights 50 gms x 5 including hanger.
a) With superior board and pulleys (Stand type)   
b) With regular board and pulleys (Wall type)  

Inclined Plane :  Same as above with brass C.P. arc
a)60 x 7.5cm
b)60 x 10cm  

Melde's Apparatus :  Special quality  "INCO type" can be used  in vertical or horizontal position with electrically maintained tuning forks,silk cord, pulley, stand and scale pan but without weights.  

Melde's Apparatus :  Workable on 230 volts  A.C. mounted  on wooden box.       

Melde's Apparatus :  Simple form, comprising of a tuning fork mounted on G clamp with adjustable pulley, stand, silk cord, scale pan and hammer. 

Vibrator Electrical :  To determine the frequency of A.C. mains,  E.M.F.of cell and for Melde's experiment, with pulley and pan, workable  on 220 volts A.C. 

Vibrating Bar :  30cm long adjustable C.P. bar fitted on base to determinethe frequency of A.C. mains, workable on 6 volts D.C. batery. 

Sonometer :  Comprising nicely polished wooden resonance box with brass fitting, complete with  two moveable bridges, pulley and three different wires but without weights superior quality.