This paper reports results of an experimental study on various fluid patterns produced by two symmetric impinging Newtonian liquid jets. Water–glycerol mixtures with viscosities of 5 mPa·s, 15 mPa·s and 40 mPa·s were used to study the effect of viscosity on fluid patterns. Two liquid jets with a diameter of 0.76 mm each were made to impinge on each other. Images in the plane perpendicular to both liquid jets were captured using a backlight direct imaging method using a 4 MPixel CCD camera. New types of periodic patterns, which to date have not been reported for Newtonian liquids, were observed in this study. It was observed that the velocity at which periodic patterns start to appear depends on the liquid viscosity. A fish-bone-like periodic structure was observed only with the 5 mPa·s liquid, while periodic shedding of droplets from the rim is not observed with the 40 mPa·s viscosity liquid. Periodic patterns were observed for all the liquids only at an impinging angle of 60 o , unlike in earlier studies where the patterns were observed with an impinging angle of 90 o . It was also observed that significant asymmetry between the liquid jets is not necessary for the formation of periodic patterns. © 2018 by Begell House, Inc.