Light micrograph of the renal cortex stained with a silver method for reticular fibres, showing the basement membranes in a Malpighian body. With this method, the basement membrane of the Bowman's capsule is clearly observed and, within the glomerulus, the basement membrane of the capillaries that form the glomerular tuft. Outside the renal corpuscles, the convoluted tubules appear with their basement membranes outlined in black.