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Conditioning stimulation of the peroneal nerve at rest produces a decrease in the N-response of the antagonist (soleus) muscle. The short latency of this inhibitory effect (not more than 2 msec) indicates that it is produced by the spinal reciprocal inhibition system (SRIS). Paired stimulation with a fixed delay of 3 msec between conditioning stimulation of the peroneal nerve and testing stimulation of the tibial nerve indicates that during the last 30 msec before voluntary movement (rapid dorsiflexion of the foot) reciprocal inhibition of the motoneuronal nucleus of the soleus muscle, the antagonist of the voluntary movement, is strengthened. During organization of the voluntary movement there is supraspinal facilitation (tuning) of the SRIS. Supraspinal regulation of the SRIS is one of the mechanisms of central control over the segmental centers of antagonist muscles.

1. A drastic increase in furnace throughput and an improvement in the production costs picture in the performance of open hearth furnaces can be achieved most effectively by using oxygen predominantly in a stream blown directly into the bath at high intensity, combined with a high rate of charge for the entire furnace burden. 2. As a result of instituting a high rate of charge of the entire furnace burden (250 to 300 tons/h) and high blowing intensity in the oxygen blow of the bath (15 to 17 m3/h ton) at the 250-ton open hearth furnace No. 1 of the Makeev metallurgical plant in 1966, furnace productivity increased 2.5 times in 1966 over the level achieved when oxygen is supplied to the process only through roof lancing, the fuel rate was cut to one-third, the total refractories required was cut 1.5 times, the net costs of the steel made was dropped 0.88 ruble/ton, and annual savings from the introduction of this high-productivity technology were 453,000 rubles. 3. Widespread use of this method for intensifying the open hearth production process will require improving the preparation of iron scrap feed, bringing the bulk density of the scrap up to the 2.5 to 3.0 ton/m3 range, as well as increasing the output of tonnage oxygen plants at metallurgical plants, equipping the furnaces with flue scrubbers, expanding auxiliary sections of the shops, and solving the problem of how to optimize the number of furnaces operating at higher productivity levels in a given shop.

It was shown in 28 experiments on rabbits that cooling by means of radiation depressed the immune response of the animals more strongly than when the cooling was by convection.

The first and fifth variations proposed by L. A. Somenov are discussed, for determining the thermophysical characteristics of materials under quasi steady-state conditions. An improved calculation procedure by these alternatives is proposed and data are presented which have been obtained from tests using this procedure.