The phrase "either of the methods" is correct and can be used in written English.
It means one of two possible methods or approaches. You can use it when presenting two options or alternatives and want to specify that one or the other can be chosen. Example: "When solving this equation, you can use either of the methods presented in the textbook. Both have been proven to be effective."
(4 Personal computers assembled using either of the methods specified in paragraphs (c)(2) or (c)(3) of this section must, by themselves, also be authorized under Supplier's Declaration of Conformity if they are marketed.
The paper also discusses the problem of inferring the distribution of the projected (three-dimensional) size of large inclusions from measurements made by either of the methods on sectional (two-dimensional) sizes.
The combination of our system and the intron 2-based PCR-RFLP method previously reported may prove to be more accurate than either of the methods alone, and therefore, useful and valuable for RHC/c genotyping.
Insofar as attrition is related to the variable that we are modelling, the parameters estimates if obtained by either of the methods discussed above will be biased.
To obtain informative spectra, it is very important to exchange all metal ions that might be present in the sample for ammonium or trialkylammonium [e.c. triethylammonium, (C2H5 3NH+] ions prior to submitting a sample to the analysis by either of the methods.
Personnel and capital equipment costs were not considered in the calculation for either of the methods.
Either of the above methods will work for germinating sunflowers for planting, but you can also use the traditional plant germinating method that follows.
As indicated by similar results shown in Table 6, we could equally have chosen either of the compared methods.
Either of the two methods could be used to compute population-average predictions, if this is desired.
