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CAT NO: DIDACTICNEL0710
Kymograph with Accessories.
Kymograph with Accessories
Universal Kymograph Assembly
This Assembly includes the Universal Kymograph with Stimulator plus a
comprehensive set of accessories with a 165 page Applications Manual
with detailed instructions for over 30 experiments. Some of the possible
experiments include:
Frog Heart In Situ Preparation:
Recording of cardiac activity
Effect of stimulation of the heart (refractory period compensatory
pause)
Demonstration of conduction path (stimulus ligatures)
Effects of stimulating the vagus nerve (cardiac inhibition)
Effect of drugs
Muscle-Nerve Preparation:
Effect of stimulating voltage (simple muscle twitch)
Effect of stimulation frequency (tetanus)
Staircase phenomenon (Treppe)
Effect of repeated stimulation (fatigue)
Effects of drugs on muscles
Effect of pre- and after-loading on muscle efficiency For locust work, a
special cork mounting block is supplied, which wedges vertically in the
muscle chamber. The accessories for the Kymograph are listed on the
following pages.
Output Voltage: 0 to 25 V, continuously variable in 3 ranges, 0 to
250 mV, 0 to 2.5 V and 0 to 25 V
Sockets: 2 x 4 mm sockets
Impedance: < 25 ½ at max. output current of 250 mA
Pulse Width: 6 preset widths of 0.05, 0.1, 0.5, 1 2 and 5 ms
Frequency: 0.1 to 100 Hz continuously variable in 3 ranges, 0.1 to
1.0 Hz, 1 to 10 Hz and 10 to 100 Hz
Mode Selection: Continuous, single and trigger via contact arms on
spindle
Base Dimensions: 460 x 230 x 220 mm (18.1 x 9 x 8.7 in), H x W x D
Weight: 7.5 kg (16.5 lb)
Unprinted Kymograph Paper Sheets
Circumference : 500 mm (19.7 in)
Paper Height : 200 mm (7.9 in)
Pen Filler
This Pen Filler is a small plastic syringe with a capacity of 1 ml,
graduated by 0.1 ml increments. It is used to fill the pen supplied with
the writing points
Writing Ink 30ml
This specially prepared ink is for use with fine capillary tubing and
fine writing styli. Available in two sizes.
Muscle and Heart Bath Set & Bath Assy.
The Complete Assembly mounts on the upright of the Harvard Apparatus
Universal Kymograph, and permits a wide range of experiments with
muscle-nerves and frog hearts. The apparatus is made up of three parts:
the bath, the electrode and the lever and pen assembly
Myograph Board
The Myograph Board has a 6 mm thick cork plate cemented to an acrylic
bloc measuring 87 x 139 mm (3.4 x 5.5 in).
At one end and one side there are 9.5 mm mounting clamps with locking
screws for securing the board to a kymograph upright or suitable stand.
At the other end there is a fork fitting for the crank lever.
The crank lever has a threaded shank flattened on two sides that slide
into the fork fitting and is secured by to knurled thumb nuts.
The nut can move along the entire length of the shaft giving 38.1 mm
(1.5 in) vertical adjustment.
The L-shaped lever extends 72 mm (2.83 in) horizontally from the
fulcrum and 20 mm (0.78 in) vertically.
The horizontal arm has 8 holes and the vertical arm 3 holes for tying
thread.
A thumb screw can be adjusted to limit the downward movement of the
lever. The board without the lever only has one mounting clip
Dissecting Kit / Instruments
AK-1 components include fine point dressing scissors, no. 3 and no. 4
scalpel handles with no. 10 and no. 21, blades, two forceps, two teasing
needles, chain hooks, and magnifying glass.
Comes in felt lined zippered carrying case
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