INTRODUCTION In response to many requests by our trade friends for a bridge similar to our prewar model, Type CLR 3221, we have now designed and produced a new Capacitor Analyser and Resistance Bridge, including the salient features of our prewar model, but having many technical and constructional improvements which will be appreciated. The bridge covers in 3 ranges capacitances of the order of 0.00001 to 50 mfd. Indications of Power Factor are obtainable on all ranges with a direct calibration on range C2 for use in the testing of Electrolytic Capacitors. Resistances of 50 ohms to 5 megohms are measured in two ranges. Provision is made for continuity test, electrolytic leakage and insulation indications, with many other miscellaneous applications, which in addition to the routine tests that may be performed make this instrument extremely useful to any Electrical laboratory or Service Engineer. It is proposed to go into the tests in greater detail in later paragraphs. The instrument has been designed to function for long periods without detriment to component life, making it immediately available for use, eliminating the time lag of valve heating. This has been made possible by incorporating mica and paper dielectric capacitors and dry