The well-known tropic action of immune serum as an adjuvant to phagocytosis suggested early in our studies that we might here be dealing with a similar phenomenon.

After the junction at Saincaize the line forsakes the Loire, which it has followed for many miles, for its great tributary the Allier, and runs through St. Germain-des-Fossés, the junction for St. Etienne, and Vichy to Clermont Ferrand.

• What are we going to do with this leaky hosepipe?
• I know: let's use it as a garden sprinkler!

At a crank angle 6° before the TDC, the electric spark ignites the petrol mixture.